31122332977 has 2 divisors, whose sum is σ = 31122332978. Its totient is φ = 31122332976.

The previous prime is 31122332929. The next prime is 31122333001. The reversal of 31122332977 is 77923322113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22162574641 + 8959758336 = 148871^2 + 94656^2 .

It is a cyclic number.

It is not a de Polignac number, because 31122332977 - 2²³ = 31113944369 is a prime.

It is not a weakly prime, because it can be changed into another prime (31122336977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15561166488 + 15561166489.

It is an arithmetic number, because the mean of its divisors is an integer number (15561166489).

Almost surely, 2^31122332977 is an apocalyptic number.

It is an amenable number.

31122332977 is a deficient number, since it is larger than the sum of its proper divisors (1).

31122332977 is an equidigital number, since it uses as much as digits as its factorization.

31122332977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 40.

The spelling of 31122332977 in words is "thirty-one billion, one hundred twenty-two million, three hundred thirty-two thousand, nine hundred seventy-seven".