251664234 has 16 divisors (see below), whose sum is σ = 529819680. Its totient is φ = 79472880.

The previous prime is 251664227. The next prime is 251664239. The reversal of 251664234 is 432466152.

It is a junction number, because it is equal to n+sod(n) for n = 251664195 and 251664204.

It is not an unprimeable number, because it can be changed into a prime (251664239) 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, 1103677 + ... + 1103904.

It is an arithmetic number, because the mean of its divisors is an integer number (33113730).

Almost surely, 2^251664234 is an apocalyptic number.

251664234 is an abundant number, since it is smaller than the sum of its proper divisors (278155446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251664234 is a wasteful number, since it uses less digits than its factorization.

251664234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2207605.

The product of its digits is 34560, while the sum is 33.

The square root of 251664234 is about 15863.9287063451. The cubic root of 251664234 is about 631.3553034926.

The spelling of 251664234 in words is "two hundred fifty-one million, six hundred sixty-four thousand, two hundred thirty-four".