251352250220 has 24 divisors (see below), whose sum is σ = 542105665584. Its totient is φ = 97823578176.

The previous prime is 251352250213. The next prime is 251352250297. The reversal of 251352250220 is 22052253152.

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, 169831862 + ... + 169833341.

It is an arithmetic number, because the mean of its divisors is an integer number (22587736066).

Almost surely, 2^251352250220 is an apocalyptic number.

251352250220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251352250220 is an abundant number, since it is smaller than the sum of its proper divisors (290753415364).

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

251352250220 is a wasteful number, since it uses less digits than its factorization.

251352250220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339665249 (or 339665247 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The spelling of 251352250220 in words is "two hundred fifty-one billion, three hundred fifty-two million, two hundred fifty thousand, two hundred twenty".