251261275332 has 24 divisors (see below), whose sum is σ = 606492734400. Its totient is φ = 80865697696.

The previous prime is 251261275319. The next prime is 251261275351. The reversal of 251261275332 is 233572162152.

It is a super-2 number, since 2×251261275332² (a number of 24 digits) contains 22 as substring.

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, 361007232 + ... + 361007927.

It is an arithmetic number, because the mean of its divisors is an integer number (25270530600).

Almost surely, 2^251261275332 is an apocalyptic number.

It is an amenable number.

251261275332 is an abundant number, since it is smaller than the sum of its proper divisors (355231459068).

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

251261275332 is a wasteful number, since it uses less digits than its factorization.

251261275332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722015195 (or 722015193 counting only the distinct ones).

The product of its digits is 151200, while the sum is 39.

The spelling of 251261275332 in words is "two hundred fifty-one billion, two hundred sixty-one million, two hundred seventy-five thousand, three hundred thirty-two".