204897831 has 16 divisors (see below), whose sum is σ = 276576768. Its totient is φ = 134916800.

The previous prime is 204897829. The next prime is 204897839. The reversal of 204897831 is 138798402.

It is a cyclic number.

It is not a de Polignac number, because 204897831 - 2¹ = 204897829 is a prime.

It is a super-2 number, since 2×204897831² = 83966242297009122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204897839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137611 + ... + 139091.

It is an arithmetic number, because the mean of its divisors is an integer number (17286048).

Almost surely, 2^204897831 is an apocalyptic number.

204897831 is a deficient number, since it is larger than the sum of its proper divisors (71678937).

204897831 is a wasteful number, since it uses less digits than its factorization.

204897831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2022.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 204897831 is about 14314.2527223743. The cubic root of 204897831 is about 589.5388822596.

The spelling of 204897831 in words is "two hundred four million, eight hundred ninety-seven thousand, eight hundred thirty-one".