251231042552 has 32 divisors (see below), whose sum is σ = 538369029120. Its totient is φ = 107667087840.

The previous prime is 251231042533. The next prime is 251231042593. The reversal of 251231042552 is 255240132152.

It is a congruent number.

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, 2738693 + ... + 2828939.

It is an arithmetic number, because the mean of its divisors is an integer number (16824032160).

Almost surely, 2^251231042552 is an apocalyptic number.

It is an amenable number.

251231042552 is an abundant number, since it is smaller than the sum of its proper divisors (287137986568).

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

251231042552 is a wasteful number, since it uses less digits than its factorization.

251231042552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139971 (or 139967 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 251231042552 in words is "two hundred fifty-one billion, two hundred thirty-one million, forty-two thousand, five hundred fifty-two".