31130323220177 has 2 divisors, whose sum is σ = 31130323220178. Its totient is φ = 31130323220176.

The previous prime is 31130323220099. The next prime is 31130323220201. The reversal of 31130323220177 is 77102232303113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17296915009936 + 13833408210241 = 4158956^2 + 3719329^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31130323220177 is a prime.

It is a super-2 number, since 2×31130323220177² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31130323220077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15565161610088 + 15565161610089.

It is an arithmetic number, because the mean of its divisors is an integer number (15565161610089).

Almost surely, 2^{31130323220177} is an apocalyptic number.

It is an amenable number.

31130323220177 is a deficient number, since it is larger than the sum of its proper divisors (1).

31130323220177 is an equidigital number, since it uses as much as digits as its factorization.

31130323220177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 35.

The spelling of 31130323220177 in words is "thirty-one trillion, one hundred thirty billion, three hundred twenty-three million, two hundred twenty thousand, one hundred seventy-seven".