31022309977 has 2 divisors, whose sum is σ = 31022309978. Its totient is φ = 31022309976.

The previous prime is 31022309951. The next prime is 31022310031. The reversal of 31022309977 is 77990322013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29409163081 + 1613146896 = 171491^2 + 40164^2 .

It is a cyclic number.

It is not a de Polignac number, because 31022309977 - 2⁷ = 31022309849 is a prime.

It is not a weakly prime, because it can be changed into another prime (31022309777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15511154988 + 15511154989.

It is an arithmetic number, because the mean of its divisors is an integer number (15511154989).

Almost surely, 2^31022309977 is an apocalyptic number.

It is an amenable number.

31022309977 is a deficient number, since it is larger than the sum of its proper divisors (1).

31022309977 is an equidigital number, since it uses as much as digits as its factorization.

31022309977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 142884, while the sum is 43.

The spelling of 31022309977 in words is "thirty-one billion, twenty-two million, three hundred nine thousand, nine hundred seventy-seven".