31476121860013 has 2 divisors, whose sum is σ = 31476121860014. Its totient is φ = 31476121860012.

The previous prime is 31476121859999. The next prime is 31476121860019. The reversal of 31476121860013 is 31006812167413.

31476121860013 = 3967122² + 3967123².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15738064897129 + 15738056962884 = 3967123^2 + 3967122^2 .

It is a cyclic number.

It is not a de Polignac number, because 31476121860013 - 2⁵ = 31476121859981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31476121860019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15738060930006 + 15738060930007.

It is an arithmetic number, because the mean of its divisors is an integer number (15738060930007).

Almost surely, 2^{31476121860013} is an apocalyptic number.

31476121860013 is the 3967123-rd centered square number.

It is an amenable number.

31476121860013 is a deficient number, since it is larger than the sum of its proper divisors (1).

31476121860013 is an equidigital number, since it uses as much as digits as its factorization.

31476121860013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 31476121860013 in words is "thirty-one trillion, four hundred seventy-six billion, one hundred twenty-one million, eight hundred sixty thousand, thirteen".