204131012539 has 2 divisors, whose sum is σ = 204131012540. Its totient is φ = 204131012538.

The previous prime is 204131012509. The next prime is 204131012549. The reversal of 204131012539 is 935210131402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204131012539 - 2⁷ = 204131012411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204131012539.

It is not a weakly prime, because it can be changed into another prime (204131012509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102065506269 + 102065506270.

It is an arithmetic number, because the mean of its divisors is an integer number (102065506270).

Almost surely, 2^204131012539 is an apocalyptic number.

204131012539 is a deficient number, since it is larger than the sum of its proper divisors (1).

204131012539 is an equidigital number, since it uses as much as digits as its factorization.

204131012539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The spelling of 204131012539 in words is "two hundred four billion, one hundred thirty-one million, twelve thousand, five hundred thirty-nine".