251601252112 has 40 divisors (see below), whose sum is σ = 562228251200. Its totient is φ = 106839844992.

The previous prime is 251601252103. The next prime is 251601252127. The reversal of 251601252112 is 211252106152.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10292562 + ... + 10316977.

It is an arithmetic number, because the mean of its divisors is an integer number (14055706280).

Almost surely, 2^251601252112 is an apocalyptic number.

It is an amenable number.

251601252112 is an abundant number, since it is smaller than the sum of its proper divisors (310626999088).

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

251601252112 is a wasteful number, since it uses less digits than its factorization.

251601252112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20609663 (or 20609657 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 28.

Adding to 251601252112 its reverse (211252106152), we get a palindrome (462853358264).

The spelling of 251601252112 in words is "two hundred fifty-one billion, six hundred one million, two hundred fifty-two thousand, one hundred twelve".