426631521 has 16 divisors (see below), whose sum is σ = 576956160. Its totient is φ = 280375680.

The previous prime is 426631501. The next prime is 426631547. The reversal of 426631521 is 125136624.

It is not a de Polignac number, because 426631521 - 2⁵ = 426631489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (426631501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222061 + ... + 223973.

It is an arithmetic number, because the mean of its divisors is an integer number (36059760).

Almost surely, 2^426631521 is an apocalyptic number.

It is an amenable number.

426631521 is a deficient number, since it is larger than the sum of its proper divisors (150324639).

426631521 is a wasteful number, since it uses less digits than its factorization.

426631521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2936.

The product of its digits is 8640, while the sum is 30.

The square root of 426631521 is about 20655.0604211171. The cubic root of 426631521 is about 752.8081517006.

The spelling of 426631521 in words is "four hundred twenty-six million, six hundred thirty-one thousand, five hundred twenty-one".