31602457213 has 2 divisors, whose sum is σ = 31602457214. Its totient is φ = 31602457212.

The previous prime is 31602457177. The next prime is 31602457223. The reversal of 31602457213 is 31275420613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21144940569 + 10457516644 = 145413^2 + 102262^2 .

It is a cyclic number.

It is not a de Polignac number, because 31602457213 - 2⁹ = 31602456701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31602457223) 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, 15801228606 + 15801228607.

It is an arithmetic number, because the mean of its divisors is an integer number (15801228607).

Almost surely, 2^31602457213 is an apocalyptic number.

It is an amenable number.

31602457213 is a deficient number, since it is larger than the sum of its proper divisors (1).

31602457213 is an equidigital number, since it uses as much as digits as its factorization.

31602457213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

Adding to 31602457213 its reverse (31275420613), we get a palindrome (62877877826).

The spelling of 31602457213 in words is "thirty-one billion, six hundred two million, four hundred fifty-seven thousand, two hundred thirteen".