31530240164977 has 2 divisors, whose sum is σ = 31530240164978. Its totient is φ = 31530240164976.

The previous prime is 31530240164939. The next prime is 31530240165059. The reversal of 31530240164977 is 77946104203513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25689854442256 + 5840385722721 = 5068516^2 + 2416689^2 .

It is a cyclic number.

It is not a de Polignac number, because 31530240164977 - 2¹¹ = 31530240162929 is a prime.

It is a super-2 number, since 2×31530240164977² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31530240164177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15765120082488 + 15765120082489.

It is an arithmetic number, because the mean of its divisors is an integer number (15765120082489).

Almost surely, 2^{31530240164977} is an apocalyptic number.

It is an amenable number.

31530240164977 is a deficient number, since it is larger than the sum of its proper divisors (1).

31530240164977 is an equidigital number, since it uses as much as digits as its factorization.

31530240164977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3810240, while the sum is 52.

The spelling of 31530240164977 in words is "thirty-one trillion, five hundred thirty billion, two hundred forty million, one hundred sixty-four thousand, nine hundred seventy-seven".