31233940277 has 2 divisors, whose sum is σ = 31233940278. Its totient is φ = 31233940276.

The previous prime is 31233940273. The next prime is 31233940301. The reversal of 31233940277 is 77204933213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20913208996 + 10320731281 = 144614^2 + 101591^2 .

It is a cyclic number.

It is not a de Polignac number, because 31233940277 - 2² = 31233940273 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31233940273) 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, 15616970138 + 15616970139.

It is an arithmetic number, because the mean of its divisors is an integer number (15616970139).

Almost surely, 2^31233940277 is an apocalyptic number.

It is an amenable number.

31233940277 is a deficient number, since it is larger than the sum of its proper divisors (1).

31233940277 is an equidigital number, since it uses as much as digits as its factorization.

31233940277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 41.

The spelling of 31233940277 in words is "thirty-one billion, two hundred thirty-three million, nine hundred forty thousand, two hundred seventy-seven".