251166112212 has 48 divisors (see below), whose sum is σ = 607097157632. Its totient is φ = 80734998240.

The previous prime is 251166112187. The next prime is 251166112237. The reversal of 251166112212 is 212211661152.

It is an interprime number because it is at equal distance from previous prime (251166112187) and next prime (251166112237).

It is a self number, because there is not a number n which added to its sum of digits gives 251166112212.

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, 1087618 + ... + 1298169.

Almost surely, 2^251166112212 is an apocalyptic number.

It is an amenable number.

251166112212 is an abundant number, since it is smaller than the sum of its proper divisors (355931045420).

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

251166112212 is a wasteful number, since it uses less digits than its factorization.

251166112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386108 (or 2386106 counting only the distinct ones).

The product of its digits is 2880, while the sum is 30.

Adding to 251166112212 its reverse (212211661152), we get a palindrome (463377773364).

It can be divided in two parts, 251166 and 112212, that added together give a triangular number (363378 = T₈₅₂).

The spelling of 251166112212 in words is "two hundred fifty-one billion, one hundred sixty-six million, one hundred twelve thousand, two hundred twelve".