204206831 has 2 divisors, whose sum is σ = 204206832. Its totient is φ = 204206830.

The previous prime is 204206797. The next prime is 204206843. The reversal of 204206831 is 138602402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204206831 is a prime.

It is a super-2 number, since 2×204206831² = 83400859654125122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204206831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204206881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102103415 + 102103416.

It is an arithmetic number, because the mean of its divisors is an integer number (102103416).

Almost surely, 2^204206831 is an apocalyptic number.

204206831 is a deficient number, since it is larger than the sum of its proper divisors (1).

204206831 is an equidigital number, since it uses as much as digits as its factorization.

204206831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 204206831 is about 14290.0955560136. The cubic root of 204206831 is about 588.8754131101.

The spelling of 204206831 in words is "two hundred four million, two hundred six thousand, eight hundred thirty-one".