31144233977 has 2 divisors, whose sum is σ = 31144233978. Its totient is φ = 31144233976.

The previous prime is 31144233941. The next prime is 31144234027. The reversal of 31144233977 is 77933244113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16791235561 + 14352998416 = 129581^2 + 119804^2 .

It is a cyclic number.

It is not a de Polignac number, because 31144233977 - 2²⁰ = 31143185401 is a prime.

It is not a weakly prime, because it can be changed into another prime (31144233907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15572116988 + 15572116989.

It is an arithmetic number, because the mean of its divisors is an integer number (15572116989).

Almost surely, 2^31144233977 is an apocalyptic number.

It is an amenable number.

31144233977 is a deficient number, since it is larger than the sum of its proper divisors (1).

31144233977 is an equidigital number, since it uses as much as digits as its factorization.

31144233977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 44.

The spelling of 31144233977 in words is "thirty-one billion, one hundred forty-four million, two hundred thirty-three thousand, nine hundred seventy-seven".