204603631 has 4 divisors (see below), whose sum is σ = 205859032. Its totient is φ = 203348232.

The previous prime is 204603587. The next prime is 204603649. The reversal of 204603631 is 136306402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204603631 is a prime.

It is a super-2 number, since 2×204603631² = 83725291636768322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204603596 and 204603605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204603661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 627456 + ... + 627781.

It is an arithmetic number, because the mean of its divisors is an integer number (51464758).

Almost surely, 2^204603631 is an apocalyptic number.

204603631 is a deficient number, since it is larger than the sum of its proper divisors (1255401).

204603631 is a wasteful number, since it uses less digits than its factorization.

204603631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255400.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 204603631 is about 14303.9725600967. The cubic root of 204603631 is about 589.2565864177.

The spelling of 204603631 in words is "two hundred four million, six hundred three thousand, six hundred thirty-one".