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214907912 = 23712732
BaseRepresentation
bin11001100111100…
…11110000001000
3112222101110020022
430303303300020
5420004023122
633154120012
75216454452
oct1463636010
9488343208
10214907912
1110034554a
125bb80008
13356a6a5b
14207832d2
1513d01642
hexccf3c08

214907912 has 36 divisors (see below), whose sum is σ = 414383085. Its totient is φ = 104489280.

The previous prime is 214907911. The next prime is 214907939. The reversal of 214907912 is 219709412.

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 2 ways, for example, as 213919876 + 988036 = 14626^2 + 994^2 .

It is an ABA number since it can be written as A⋅BA, here for A=2, B=10366.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (214907911) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 2943908 + ... + 2943980.

Almost surely, 2214907912 is an apocalyptic number.

It is an amenable number.

214907912 is a deficient number, since it is larger than the sum of its proper divisors (199475173).

214907912 is an frugal number, since it uses more digits than its factorization.

214907912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 214907912 is about 14659.7377875595. The cubic root of 214907912 is about 598.9870984203.

The spelling of 214907912 in words is "two hundred fourteen million, nine hundred seven thousand, nine hundred twelve".

Divisors: 1 2 4 8 71 73 142 146 284 292 568 584 5041 5183 5329 10082 10366 10658 20164 20732 21316 40328 41464 42632 367993 378359 735986 756718 1471972 1513436 2943944 3026872 26863489 53726978 107453956 214907912