521162001 has 12 divisors (see below), whose sum is σ = 792410320. Its totient is φ = 329154840.

The previous prime is 521161957. The next prime is 521162003. The reversal of 521162001 is 100261125.

It is not a de Polignac number, because 521162001 - 2⁷ = 521161873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521162003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1523695 + ... + 1524036.

Almost surely, 2^521162001 is an apocalyptic number.

It is an amenable number.

521162001 is a deficient number, since it is larger than the sum of its proper divisors (271248319).

521162001 is a wasteful number, since it uses less digits than its factorization.

521162001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3047756 (or 3047753 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 521162001 is about 22828.9728415450. The cubic root of 521162001 is about 804.7436916610.

The spelling of 521162001 in words is "five hundred twenty-one million, one hundred sixty-two thousand, one".