251228312112 has 40 divisors (see below), whose sum is σ = 649075637056. Its totient is φ = 83733846336.

The previous prime is 251228312099. The next prime is 251228312113. The reversal of 251228312112 is 211213822152.

It is a self number, because there is not a number n which added to its sum of digits gives 251228312112.

It is not an unprimeable number, because it can be changed into a prime (251228312113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184143 + ... + 732369.

Almost surely, 2^251228312112 is an apocalyptic number.

It is an amenable number.

251228312112 is an abundant number, since it is smaller than the sum of its proper divisors (397847324944).

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

251228312112 is a wasteful number, since it uses less digits than its factorization.

251228312112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557785 (or 557779 counting only the distinct ones).

The product of its digits is 3840, while the sum is 30.

The spelling of 251228312112 in words is "two hundred fifty-one billion, two hundred twenty-eight million, three hundred twelve thousand, one hundred twelve".