251040012 has 24 divisors (see below), whose sum is σ = 596813616. Its totient is φ = 82100928.

The previous prime is 251040001. The next prime is 251040029. The reversal of 251040012 is 210040152.

251040012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 251039973 and 251040000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196723 + ... + 197994.

It is an arithmetic number, because the mean of its divisors is an integer number (24867234).

Almost surely, 2^251040012 is an apocalyptic number.

It is an amenable number.

251040012 is an abundant number, since it is smaller than the sum of its proper divisors (345773604).

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

251040012 is a wasteful number, since it uses less digits than its factorization.

251040012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394777 (or 394775 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 251040012 is about 15844.2422349572. The cubic root of 251040012 is about 630.8328717359.

Adding to 251040012 its reverse (210040152), we get a palindrome (461080164).

The spelling of 251040012 in words is "two hundred fifty-one million, forty thousand, twelve".