251201220727252 has 24 divisors (see below), whose sum is σ = 439901315596512. Its totient is φ = 125515159380000.

The previous prime is 251201220727243. The next prime is 251201220727267. The reversal of 251201220727252 is 252727022102152.

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, 31289802 + ... + 38489662.

It is an arithmetic number, because the mean of its divisors is an integer number (18329221483188).

Almost surely, 2^{251201220727252} is an apocalyptic number.

It is an amenable number.

251201220727252 is a deficient number, since it is larger than the sum of its proper divisors (188700094869260).

251201220727252 is a wasteful number, since it uses less digits than its factorization.

251201220727252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7205799 (or 7205797 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 40.

The spelling of 251201220727252 in words is "two hundred fifty-one trillion, two hundred one billion, two hundred twenty million, seven hundred twenty-seven thousand, two hundred fifty-two".