251115472 has 40 divisors (see below), whose sum is σ = 511663680. Its totient is φ = 119159040.

The previous prime is 251115451. The next prime is 251115503. The reversal of 251115472 is 274511152.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 251115472.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45604 + ... + 50812.

It is an arithmetic number, because the mean of its divisors is an integer number (12791592).

Almost surely, 2^251115472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 251115472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255831840).

251115472 is an abundant number, since it is smaller than the sum of its proper divisors (260548208).

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

251115472 is a wasteful number, since it uses less digits than its factorization.

251115472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5371 (or 5365 counting only the distinct ones).

The product of its digits is 2800, while the sum is 28.

The square root of 251115472 is about 15846.6233627231. The cubic root of 251115472 is about 630.8960726566.

The spelling of 251115472 in words is "two hundred fifty-one million, one hundred fifteen thousand, four hundred seventy-two".