31530377303497 has 2 divisors, whose sum is σ = 31530377303498. Its totient is φ = 31530377303496.

The previous prime is 31530377303489. The next prime is 31530377303549. The reversal of 31530377303497 is 79430377303513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19198909302336 + 12331468001161 = 4381656^2 + 3511619^2 .

It is a cyclic number.

It is not a de Polignac number, because 31530377303497 - 2³ = 31530377303489 is a prime.

It is not a weakly prime, because it can be changed into another prime (31530377303797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15765188651748 + 15765188651749.

It is an arithmetic number, because the mean of its divisors is an integer number (15765188651749).

Almost surely, 2^{31530377303497} is an apocalyptic number.

It is an amenable number.

31530377303497 is a deficient number, since it is larger than the sum of its proper divisors (1).

31530377303497 is an equidigital number, since it uses as much as digits as its factorization.

31530377303497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15002820, while the sum is 55.

The spelling of 31530377303497 in words is "thirty-one trillion, five hundred thirty billion, three hundred seventy-seven million, three hundred three thousand, four hundred ninety-seven".