251772072 has 32 divisors (see below), whose sum is σ = 630957600. Its totient is φ = 83720384.

The previous prime is 251772061. The next prime is 251772077. The reversal of 251772072 is 270277152.

251772072 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (251772077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2463 + ... + 22574.

It is an arithmetic number, because the mean of its divisors is an integer number (19717425).

Almost surely, 2^251772072 is an apocalyptic number.

It is an amenable number.

251772072 is an abundant number, since it is smaller than the sum of its proper divisors (379185528).

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

251772072 is a wasteful number, since it uses less digits than its factorization.

251772072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25465 (or 25461 counting only the distinct ones).

The product of its (nonzero) digits is 13720, while the sum is 33.

The square root of 251772072 is about 15867.3271851311. The cubic root of 251772072 is about 631.4454690938.

The spelling of 251772072 in words is "two hundred fifty-one million, seven hundred seventy-two thousand, seventy-two".