251225970 has 16 divisors (see below), whose sum is σ = 602942400. Its totient is φ = 66993584.

The previous prime is 251225921. The next prime is 251225971. The reversal of 251225970 is 79522152.

It is a happy number.

It is a super-2 number, since 2×251225970² = 126228976004881800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (251225971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4187070 + ... + 4187129.

It is an arithmetic number, because the mean of its divisors is an integer number (37683900).

Almost surely, 2^251225970 is an apocalyptic number.

251225970 is an abundant number, since it is smaller than the sum of its proper divisors (351716430).

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

251225970 is a wasteful number, since it uses less digits than its factorization.

251225970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8374209.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 251225970 is about 15850.1094633444. The cubic root of 251225970 is about 630.9885965341.

It can be divided in two parts, 2512 and 25970, that added together give a palindrome (28482).

The spelling of 251225970 in words is "two hundred fifty-one million, two hundred twenty-five thousand, nine hundred seventy".