204539653231 has 2 divisors, whose sum is σ = 204539653232. Its totient is φ = 204539653230.

The previous prime is 204539653211. The next prime is 204539653249. The reversal of 204539653231 is 132356935402.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204539653231 - 2⁷ = 204539653103 is a prime.

It is a super-2 number, since 2×204539653231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204539653211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102269826615 + 102269826616.

It is an arithmetic number, because the mean of its divisors is an integer number (102269826616).

Almost surely, 2^204539653231 is an apocalyptic number.

204539653231 is a deficient number, since it is larger than the sum of its proper divisors (1).

204539653231 is an equidigital number, since it uses as much as digits as its factorization.

204539653231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 583200, while the sum is 43.

The spelling of 204539653231 in words is "two hundred four billion, five hundred thirty-nine million, six hundred fifty-three thousand, two hundred thirty-one".