251201220727250 has 64 divisors (see below), whose sum is σ = 487449038868480. Its totient is φ = 96832323000000.

The previous prime is 251201220727243. The next prime is 251201220727267. The reversal of 251201220727250 is 52727022102152.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65957501 + ... + 69662000.

It is an arithmetic number, because the mean of its divisors is an integer number (7616391232320).

Almost surely, 2^{251201220727250} is an apocalyptic number.

251201220727250 is a deficient number, since it is larger than the sum of its proper divisors (236247818141230).

251201220727250 is a wasteful number, since it uses less digits than its factorization.

251201220727250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135619788 (or 135619778 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 38.

The spelling of 251201220727250 in words is "two hundred fifty-one trillion, two hundred one billion, two hundred twenty million, seven hundred twenty-seven thousand, two hundred fifty".