204400531 has 8 divisors (see below), whose sum is σ = 208502784. Its totient is φ = 200337480.

The previous prime is 204400529. The next prime is 204400541. The reversal of 204400531 is 135004402.

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

It is a cyclic number.

It is not a de Polignac number, because 204400531 - 2¹ = 204400529 is a prime.

It is a super-2 number, since 2×204400531² = 83559154146163922, 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 = 204400499 and 204400508.

It is not an unprimeable number, because it can be changed into a prime (204400501) 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, 846 + ... + 20236.

It is an arithmetic number, because the mean of its divisors is an integer number (26062848).

Almost surely, 2^204400531 is an apocalyptic number.

204400531 is a deficient number, since it is larger than the sum of its proper divisors (4102253).

204400531 is a wasteful number, since it uses less digits than its factorization.

204400531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19601.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 204400531 is about 14296.8713710378. The cubic root of 204400531 is about 589.0615464870.

Adding to 204400531 its reverse (135004402), we get a palindrome (339404933).

The spelling of 204400531 in words is "two hundred four million, four hundred thousand, five hundred thirty-one".