251220496 has 20 divisors (see below), whose sum is σ = 487125072. Its totient is φ = 125510816.

The previous prime is 251220481. The next prime is 251220503. The reversal of 251220496 is 694022152.

It is a super-2 number, since 2×251220496² = 126223475220972032, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 17331 + ... + 28333.

Almost surely, 2^251220496 is an apocalyptic number.

It is an amenable number.

251220496 is a deficient number, since it is larger than the sum of its proper divisors (235904576).

251220496 is a wasteful number, since it uses less digits than its factorization.

251220496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12438 (or 12432 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 251220496 is about 15849.9367822083. The cubic root of 251220496 is about 630.9840135994.

The spelling of 251220496 in words is "two hundred fifty-one million, two hundred twenty thousand, four hundred ninety-six".