251224572 has 96 divisors (see below), whose sum is σ = 638487360. Its totient is φ = 76595200.

The previous prime is 251224549. The next prime is 251224573. The reversal of 251224572 is 275422152.

It is a super-2 number, since 2×251224572² = 126227571153166368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251224573) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1833688 + ... + 1833824.

It is an arithmetic number, because the mean of its divisors is an integer number (6650910).

Almost surely, 2^251224572 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 251224572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319243680).

251224572 is an abundant number, since it is smaller than the sum of its proper divisors (387262788).

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

251224572 is a wasteful number, since it uses less digits than its factorization.

251224572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 349 counting only the distinct ones).

The product of its digits is 11200, while the sum is 30.

The square root of 251224572 is about 15850.0653626413. The cubic root of 251224572 is about 630.9874261088.

The spelling of 251224572 in words is "two hundred fifty-one million, two hundred twenty-four thousand, five hundred seventy-two".