31012138270177 has 2 divisors, whose sum is σ = 31012138270178. Its totient is φ = 31012138270176.

The previous prime is 31012138270171. The next prime is 31012138270181. The reversal of 31012138270177 is 77107283121013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19493010877921 + 11519127392256 = 4415089^2 + 3393984^2 .

It is a cyclic number.

It is not a de Polignac number, because 31012138270177 - 2⁷ = 31012138270049 is a prime.

It is a super-2 number, since 2×31012138270177² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31012138270171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506069135088 + 15506069135089.

It is an arithmetic number, because the mean of its divisors is an integer number (15506069135089).

Almost surely, 2^{31012138270177} is an apocalyptic number.

It is an amenable number.

31012138270177 is a deficient number, since it is larger than the sum of its proper divisors (1).

31012138270177 is an equidigital number, since it uses as much as digits as its factorization.

31012138270177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98784, while the sum is 43.

The spelling of 31012138270177 in words is "thirty-one trillion, twelve billion, one hundred thirty-eight million, two hundred seventy thousand, one hundred seventy-seven".