| Base | Representation |
|---|---|
| bin | 11001110100010… |
| … | …01011101001000 |
| 3 | 120002111212201222 |
| 4 | 30322021131020 |
| 5 | 420420212142 |
| 6 | 33253501212 |
| 7 | 5236545314 |
| oct | 1472113510 |
| 9 | 502455658 |
| 10 | 216569672 |
| 11 | 101280000 |
| 12 | 60641808 |
| 13 | 35b39247 |
| 14 | 20a96b44 |
| 15 | 1402dbd2 |
| hex | ce89748 |
216569672 has 60 divisors (see below), whose sum is σ = 457301475. Its totient is φ = 96151440.
The previous prime is 216569653. The next prime is 216569687. The reversal of 216569672 is 276965612.
It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.
It can be written as a sum of positive squares in only one way, i.e., 108284836 + 108284836 = 10406^2 + 10406^2 .
It is an ABA number since it can be written as A⋅BA, here for A=2, B=10406.
It is a Harshad number since it is a multiple of its sum of digits (44).
It is an alternating number because its digits alternate between even and odd.
It is a Duffinian number.
Its product of digits (272160) is a multiple of the sum of its prime divisors (56).
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 5036483 + ... + 5036525.
Almost surely, 2216569672 is an apocalyptic number.
216569672 is a gapful number since it is divisible by the number (22) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 216569672
216569672 is an abundant number, since it is smaller than the sum of its proper divisors (240731803).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
216569672 is an frugal number, since it uses more digits than its factorization.
216569672 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 136 (or 56 counting only the distinct ones).
The product of its digits is 272160, while the sum is 44.
The square root of 216569672 is about 14716.3063300544. The cubic root of 216569672 is about 600.5270110375.
The spelling of 216569672 in words is "two hundred sixteen million, five hundred sixty-nine thousand, six hundred seventy-two".
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