251311252010 has 32 divisors (see below), whose sum is σ = 556751083392. Its totient is φ = 79535868480.

The previous prime is 251311252009. The next prime is 251311252021. The reversal of 251311252010 is 10252113152.

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, 138082196 + ... + 138084015.

It is an arithmetic number, because the mean of its divisors is an integer number (17398471356).

Almost surely, 2^251311252010 is an apocalyptic number.

251311252010 is an abundant number, since it is smaller than the sum of its proper divisors (305439831382).

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

251311252010 is a wasteful number, since it uses less digits than its factorization.

251311252010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276166238.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 251311252010 its reverse (10252113152), we get a palindrome (261563365162).

The spelling of 251311252010 in words is "two hundred fifty-one billion, three hundred eleven million, two hundred fifty-two thousand, ten".