205513415131 has 2 divisors, whose sum is σ = 205513415132. Its totient is φ = 205513415130.

The previous prime is 205513415099. The next prime is 205513415137. The reversal of 205513415131 is 131514315502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205513415131 - 2⁵ = 205513415099 is a prime.

It is a super-2 number, since 2×205513415131² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205513415093 and 205513415102.

It is not a weakly prime, because it can be changed into another prime (205513415137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102756707565 + 102756707566.

It is an arithmetic number, because the mean of its divisors is an integer number (102756707566).

Almost surely, 2^205513415131 is an apocalyptic number.

205513415131 is a deficient number, since it is larger than the sum of its proper divisors (1).

205513415131 is an equidigital number, since it uses as much as digits as its factorization.

205513415131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 31.

The spelling of 205513415131 in words is "two hundred five billion, five hundred thirteen million, four hundred fifteen thousand, one hundred thirty-one".