204101631 has 12 divisors (see below), whose sum is σ = 299214552. Its totient is φ = 134036496.

The previous prime is 204101627. The next prime is 204101647. The reversal of 204101631 is 136101402.

It is a happy number.

204101631 is a `hidden beast` number, since 20 + 4 + 10 + 1 + 631 = 666.

It is not a de Polignac number, because 204101631 - 2² = 204101627 is a prime.

It is a super-2 number, since 2×204101631² = 83314951553720322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204101621) 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, 168636 + ... + 169841.

It is an arithmetic number, because the mean of its divisors is an integer number (24934546).

Almost surely, 2^204101631 is an apocalyptic number.

204101631 is a deficient number, since it is larger than the sum of its proper divisors (95112921).

204101631 is a wasteful number, since it uses less digits than its factorization.

204101631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338550 (or 338547 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 204101631 is about 14286.4142107108. The cubic root of 204101631 is about 588.7742732768.

The spelling of 204101631 in words is "two hundred four million, one hundred one thousand, six hundred thirty-one".