31503041657 has 2 divisors, whose sum is σ = 31503041658. Its totient is φ = 31503041656.

The previous prime is 31503041639. The next prime is 31503041659. The reversal of 31503041657 is 75614030513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30489001321 + 1014040336 = 174611^2 + 31844^2 .

It is a cyclic number.

It is not a de Polignac number, because 31503041657 - 2¹² = 31503037561 is a prime.

Together with 31503041659, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31503041659) 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, 15751520828 + 15751520829.

It is an arithmetic number, because the mean of its divisors is an integer number (15751520829).

Almost surely, 2^31503041657 is an apocalyptic number.

It is an amenable number.

31503041657 is a deficient number, since it is larger than the sum of its proper divisors (1).

31503041657 is an equidigital number, since it uses as much as digits as its factorization.

31503041657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 35.

The spelling of 31503041657 in words is "thirty-one billion, five hundred three million, forty-one thousand, six hundred fifty-seven".