251010012 has 48 divisors (see below), whose sum is σ = 639862272. Its totient is φ = 75953280.

The previous prime is 251009987. The next prime is 251010029. The reversal of 251010012 is 210010152.

251010012 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×251010012² = 126012052248480288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 251010012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174448 + ... + 175880.

It is an arithmetic number, because the mean of its divisors is an integer number (13330464).

Almost surely, 2^251010012 is an apocalyptic number.

251010012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

251010012 is an abundant number, since it is smaller than the sum of its proper divisors (388852260).

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

251010012 is a wasteful number, since it uses less digits than its factorization.

251010012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2778 (or 2776 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 251010012 is about 15843.2954905222. The cubic root of 251010012 is about 630.8077419569.

Adding to 251010012 its reverse (210010152), we get a palindrome (461020164).

The spelling of 251010012 in words is "two hundred fifty-one million, ten thousand, twelve".