31263006557 has 2 divisors, whose sum is σ = 31263006558. Its totient is φ = 31263006556.

The previous prime is 31263006521. The next prime is 31263006559. The reversal of 31263006557 is 75560036213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21834790756 + 9428215801 = 147766^2 + 97099^2 .

It is a cyclic number.

It is not a de Polignac number, because 31263006557 - 2⁶ = 31263006493 is a prime.

Together with 31263006559, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31263006557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31263006559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15631503278 + 15631503279.

It is an arithmetic number, because the mean of its divisors is an integer number (15631503279).

Almost surely, 2^31263006557 is an apocalyptic number.

It is an amenable number.

31263006557 is a deficient number, since it is larger than the sum of its proper divisors (1).

31263006557 is an equidigital number, since it uses as much as digits as its factorization.

31263006557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 38.

The spelling of 31263006557 in words is "thirty-one billion, two hundred sixty-three million, six thousand, five hundred fifty-seven".