204051631 has 6 divisors (see below), whose sum is σ = 237366240. Its totient is φ = 174901356.

The previous prime is 204051623. The next prime is 204051637. The reversal of 204051631 is 136150402.

204051631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 204051631 - 2³ = 204051623 is a prime.

It is a super-2 number, since 2×204051631² = 83274136227520322, 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 (204051637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2082111 + ... + 2082208.

It is an arithmetic number, because the mean of its divisors is an integer number (39561040).

Almost surely, 2^204051631 is an apocalyptic number.

204051631 is a deficient number, since it is larger than the sum of its proper divisors (33314609).

204051631 is an equidigital number, since it uses as much as digits as its factorization.

204051631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4164333 (or 4164326 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 204051631 is about 14284.6641892626. The cubic root of 204051631 is about 588.7261908292.

The spelling of 204051631 in words is "two hundred four million, fifty-one thousand, six hundred thirty-one".