251265164 has 24 divisors (see below), whose sum is σ = 457455600. Its totient is φ = 120612800.

The previous prime is 251265163. The next prime is 251265167. The reversal of 251265164 is 461562152.

It is a self number, because there is not a number n which added to its sum of digits gives 251265164.

It is not an unprimeable number, because it can be changed into a prime (251265163) 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, 14714 + ... + 26814.

It is an arithmetic number, because the mean of its divisors is an integer number (19060650).

Almost surely, 2^251265164 is an apocalyptic number.

It is an amenable number.

251265164 is a deficient number, since it is larger than the sum of its proper divisors (206190436).

251265164 is a wasteful number, since it uses less digits than its factorization.

251265164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12313 (or 12311 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 251265164 is about 15851.3458103721. The cubic root of 251265164 is about 631.0214085361.

It can be divided in two parts, 2512 and 65164, that added together give a palindrome (67676).

The spelling of 251265164 in words is "two hundred fifty-one million, two hundred sixty-five thousand, one hundred sixty-four".