31534650013 has 2 divisors, whose sum is σ = 31534650014. Its totient is φ = 31534650012.

The previous prime is 31534649983. The next prime is 31534650023. The reversal of 31534650013 is 31005643513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25305810084 + 6228839929 = 159078^2 + 78923^2 .

It is a cyclic number.

It is not a de Polignac number, because 31534650013 - 2⁵ = 31534649981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31534650023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15767325006 + 15767325007.

It is an arithmetic number, because the mean of its divisors is an integer number (15767325007).

Almost surely, 2^31534650013 is an apocalyptic number.

It is an amenable number.

31534650013 is a deficient number, since it is larger than the sum of its proper divisors (1).

31534650013 is an equidigital number, since it uses as much as digits as its factorization.

31534650013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 31.

The spelling of 31534650013 in words is "thirty-one billion, five hundred thirty-four million, six hundred fifty thousand, thirteen".