251112115135 has 16 divisors (see below), whose sum is σ = 352781900352. Its totient is φ = 167991379200.

The previous prime is 251112115069. The next prime is 251112115153. The reversal of 251112115135 is 531511211152.

It is a de Polignac number, because none of the positive numbers 2^k-251112115135 is a prime.

It is a congruent number.

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, 87494076 + ... + 87496945.

It is an arithmetic number, because the mean of its divisors is an integer number (22048868772).

Almost surely, 2^251112115135 is an apocalyptic number.

251112115135 is a deficient number, since it is larger than the sum of its proper divisors (101669785217).

251112115135 is a wasteful number, since it uses less digits than its factorization.

251112115135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174991074.

The product of its digits is 1500, while the sum is 28.

Adding to 251112115135 its reverse (531511211152), we get a palindrome (782623326287).

The spelling of 251112115135 in words is "two hundred fifty-one billion, one hundred twelve million, one hundred fifteen thousand, one hundred thirty-five".