204501631 has 2 divisors, whose sum is σ = 204501632. Its totient is φ = 204501630.

The previous prime is 204501607. The next prime is 204501641. The reversal of 204501631 is 136105402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204501631 - 2¹¹ = 204499583 is a prime.

It is a super-2 number, since 2×204501631² = 83641834163320322, which contains 22 as substring.

It is equal to p_11314363 and since 204501631 and 11314363 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204501641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102250815 + 102250816.

It is an arithmetic number, because the mean of its divisors is an integer number (102250816).

Almost surely, 2^204501631 is an apocalyptic number.

204501631 is a deficient number, since it is larger than the sum of its proper divisors (1).

204501631 is an equidigital number, since it uses as much as digits as its factorization.

204501631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 204501631 is about 14300.4066725391. The cubic root of 204501631 is about 589.1586504523.

The spelling of 204501631 in words is "two hundred four million, five hundred one thousand, six hundred thirty-one".