251616242262 has 64 divisors (see below), whose sum is σ = 633270472704. Its totient is φ = 64744062240.

The previous prime is 251616242239. The next prime is 251616242347. The reversal of 251616242262 is 262242616152.

It is a self number, because there is not a number n which added to its sum of digits gives 251616242262.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2495538 + ... + 2594405.

It is an arithmetic number, because the mean of its divisors is an integer number (9894851136).

Almost surely, 2^251616242262 is an apocalyptic number.

251616242262 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

251616242262 is an abundant number, since it is smaller than the sum of its proper divisors (381654230442).

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

251616242262 is a wasteful number, since it uses less digits than its factorization.

251616242262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5090073.

The product of its digits is 138240, while the sum is 39.

The spelling of 251616242262 in words is "two hundred fifty-one billion, six hundred sixteen million, two hundred forty-two thousand, two hundred sixty-two".