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216634901 = 7291067167
BaseRepresentation
bin11001110100110…
…01011000010101
3120002122012012212
430322121120111
5420424304101
633255123205
75240236430
oct1472313025
9502565185
10216634901
1110131500a
1260673505
1335b5cb42
1420ab2817
15140431bb
hexce99615

216634901 has 8 divisors (see below), whose sum is σ = 256120320. Its totient is φ = 179283888.

The previous prime is 216634883. The next prime is 216634921. The reversal of 216634901 is 109436612.

216634901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216634901 - 214 = 216618517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216634921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 533381 + ... + 533786.

It is an arithmetic number, because the mean of its divisors is an integer number (32015040).

Almost surely, 2216634901 is an apocalyptic number.

It is an amenable number.

216634901 is a deficient number, since it is larger than the sum of its proper divisors (39485419).

216634901 is a wasteful number, since it uses less digits than its factorization.

216634901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067203.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 216634901 is about 14718.5223782824. The cubic root of 216634901 is about 600.5872962473.

The spelling of 216634901 in words is "two hundred sixteen million, six hundred thirty-four thousand, nine hundred one".

Divisors: 1 7 29 203 1067167 7470169 30947843 216634901