204425531 has 4 divisors (see below), whose sum is σ = 205326312. Its totient is φ = 203524752.

The previous prime is 204425519. The next prime is 204425537. The reversal of 204425531 is 135524402.

It is a happy number.

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-204425531 is a prime.

It is a super-2 number, since 2×204425531² = 83579595449263922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204425531.

It is not an unprimeable number, because it can be changed into a prime (204425537) 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, 450050 + ... + 450503.

It is an arithmetic number, because the mean of its divisors is an integer number (51331578).

Almost surely, 2^204425531 is an apocalyptic number.

204425531 is a deficient number, since it is larger than the sum of its proper divisors (900781).

204425531 is an equidigital number, since it uses as much as digits as its factorization.

204425531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900780.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 204425531 is about 14297.7456614671. The cubic root of 204425531 is about 589.0855613272.

Adding to 204425531 its reverse (135524402), we get a palindrome (339949933).

The spelling of 204425531 in words is "two hundred four million, four hundred twenty-five thousand, five hundred thirty-one".