251135531032 has 32 divisors (see below), whose sum is σ = 524818839600. Its totient is φ = 111961350144.

The previous prime is 251135530931. The next prime is 251135531033. The reversal of 251135531032 is 230135531152.

It is a junction number, because it is equal to n+sod(n) for n = 251135530985 and 251135531003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251135531033) 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, 48591753 + ... + 48596920.

Almost surely, 2^251135531032 is an apocalyptic number.

It is an amenable number.

251135531032 is an abundant number, since it is smaller than the sum of its proper divisors (273683308568).

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

251135531032 is a wasteful number, since it uses less digits than its factorization.

251135531032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97188715 (or 97188711 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 31.

The spelling of 251135531032 in words is "two hundred fifty-one billion, one hundred thirty-five million, five hundred thirty-one thousand, thirty-two".