31433213953 has 2 divisors, whose sum is σ = 31433213954. Its totient is φ = 31433213952.

The previous prime is 31433213927. The next prime is 31433214019. The reversal of 31433213953 is 35931233413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28199813184 + 3233400769 = 167928^2 + 56863^2 .

It is an emirp because it is prime and its reverse (35931233413) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31433213953 is a prime.

It is not a weakly prime, because it can be changed into another prime (31433216953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15716606976 + 15716606977.

It is an arithmetic number, because the mean of its divisors is an integer number (15716606977).

Almost surely, 2^31433213953 is an apocalyptic number.

It is an amenable number.

31433213953 is a deficient number, since it is larger than the sum of its proper divisors (1).

31433213953 is an equidigital number, since it uses as much as digits as its factorization.

31433213953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 37.

The spelling of 31433213953 in words is "thirty-one billion, four hundred thirty-three million, two hundred thirteen thousand, nine hundred fifty-three".