204715769831 has 2 divisors, whose sum is σ = 204715769832. Its totient is φ = 204715769830.

The previous prime is 204715769827. The next prime is 204715769873. The reversal of 204715769831 is 138967517402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204715769831 - 2² = 204715769827 is a prime.

It is a super-2 number, since 2×204715769831² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204715762831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102357884915 + 102357884916.

It is an arithmetic number, because the mean of its divisors is an integer number (102357884916).

It is a 1-persistent number, because it is pandigital, but 2⋅204715769831 = 409431539662 is not.

Almost surely, 2^204715769831 is an apocalyptic number.

204715769831 is a deficient number, since it is larger than the sum of its proper divisors (1).

204715769831 is an equidigital number, since it uses as much as digits as its factorization.

204715769831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 204715769831 in words is "two hundred four billion, seven hundred fifteen million, seven hundred sixty-nine thousand, eight hundred thirty-one".