251312100002 has 16 divisors (see below), whose sum is σ = 399158567712. Its totient is φ = 118259830080.

The previous prime is 251312100001. The next prime is 251312100031. The reversal of 251312100002 is 200001213152.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (251312100001) 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, 815477 + ... + 1080567.

It is an arithmetic number, because the mean of its divisors is an integer number (24947410482).

Almost surely, 2^251312100002 is an apocalyptic number.

251312100002 is a deficient number, since it is larger than the sum of its proper divisors (147846467710).

251312100002 is a wasteful number, since it uses less digits than its factorization.

251312100002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292993.

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 251312100002 its reverse (200001213152), we get a palindrome (451313313154).

The spelling of 251312100002 in words is "two hundred fifty-one billion, three hundred twelve million, one hundred thousand, two".