251115222112 has 24 divisors (see below), whose sum is σ = 494958681000. Its totient is φ = 125411430144.

The previous prime is 251115222107. The next prime is 251115222121. The reversal of 251115222112 is 211222511152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4540237 + ... + 4595212.

It is an arithmetic number, because the mean of its divisors is an integer number (20623278375).

Almost surely, 2^251115222112 is an apocalyptic number.

It is an amenable number.

251115222112 is a deficient number, since it is larger than the sum of its proper divisors (243843458888).

251115222112 is an equidigital number, since it uses as much as digits as its factorization.

251115222112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9136318 (or 9136310 counting only the distinct ones).

The product of its digits is 800, while the sum is 25.

Adding to 251115222112 its reverse (211222511152), we get a palindrome (462337733264).

The spelling of 251115222112 in words is "two hundred fifty-one billion, one hundred fifteen million, two hundred twenty-two thousand, one hundred twelve".