251225887 has 12 divisors (see below), whose sum is σ = 276655960. Its totient is φ = 227961360.

The previous prime is 251225873. The next prime is 251225911. The reversal of 251225887 is 788522152.

It is not a de Polignac number, because 251225887 - 2²⁷ = 117008159 is a prime.

It is a super-2 number, since 2×251225887² = 126228892597873538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251225867) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 76189 + ... + 79417.

Almost surely, 2^251225887 is an apocalyptic number.

251225887 is a deficient number, since it is larger than the sum of its proper divisors (25430073).

251225887 is a wasteful number, since it uses less digits than its factorization.

251225887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3894 (or 3883 counting only the distinct ones).

The product of its digits is 89600, while the sum is 40.

The square root of 251225887 is about 15850.1068450657. The cubic root of 251225887 is about 630.9885270454.

The spelling of 251225887 in words is "two hundred fifty-one million, two hundred twenty-five thousand, eight hundred eighty-seven".