204311031 has 8 divisors (see below), whose sum is σ = 272498544. Its totient is φ = 136165440.

The previous prime is 204310999. The next prime is 204311033. The reversal of 204311031 is 130113402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 204311031 - 2⁵ = 204310999 is a prime.

It is a super-2 number, since 2×204311031² = 83485994776565922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 204311031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204311033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3595 + ... + 20531.

It is an arithmetic number, because the mean of its divisors is an integer number (34062318).

Almost surely, 2^204311031 is an apocalyptic number.

204311031 is a deficient number, since it is larger than the sum of its proper divisors (68187513).

204311031 is a wasteful number, since it uses less digits than its factorization.

204311031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20961.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 204311031 is about 14293.7409728874. The cubic root of 204311031 is about 588.9755573020.

Adding to 204311031 its reverse (130113402), we get a palindrome (334424433).

The spelling of 204311031 in words is "two hundred four million, three hundred eleven thousand, thirty-one".