204022631 has 2 divisors, whose sum is σ = 204022632. Its totient is φ = 204022630.

The previous prime is 204022619. The next prime is 204022669. The reversal of 204022631 is 136220402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204022631 is a prime.

It is a super-2 number, since 2×204022631² = 83250467920324322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204022681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102011315 + 102011316.

It is an arithmetic number, because the mean of its divisors is an integer number (102011316).

Almost surely, 2^204022631 is an apocalyptic number.

204022631 is a deficient number, since it is larger than the sum of its proper divisors (1).

204022631 is an equidigital number, since it uses as much as digits as its factorization.

204022631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 204022631 is about 14283.6490785793. The cubic root of 204022631 is about 588.6982994105.

The spelling of 204022631 in words is "two hundred four million, twenty-two thousand, six hundred thirty-one".