251234315112 has 64 divisors (see below), whose sum is σ = 685510594560. Its totient is φ = 76095377600.

The previous prime is 251234315083. The next prime is 251234315119. The reversal of 251234315112 is 211513432152.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 251234315112.

It is not an unprimeable number, because it can be changed into a prime (251234315119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 331903 + ... + 782705.

It is an arithmetic number, because the mean of its divisors is an integer number (10711103040).

Almost surely, 2^251234315112 is an apocalyptic number.

251234315112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

251234315112 is an abundant number, since it is smaller than the sum of its proper divisors (434276279448).

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

251234315112 is a wasteful number, since it uses less digits than its factorization.

251234315112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452934 (or 452930 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

Adding to 251234315112 its reverse (211513432152), we get a palindrome (462747747264).

The spelling of 251234315112 in words is "two hundred fifty-one billion, two hundred thirty-four million, three hundred fifteen thousand, one hundred twelve".