31352816136157 has 2 divisors, whose sum is σ = 31352816136158. Its totient is φ = 31352816136156.

The previous prime is 31352816136151. The next prime is 31352816136391. The reversal of 31352816136157 is 75163161825313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30258074538756 + 1094741597401 = 5500734^2 + 1046299^2 .

It is a cyclic number.

It is not a de Polignac number, because 31352816136157 - 2³⁹ = 30803060322269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31352816136151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15676408068078 + 15676408068079.

It is an arithmetic number, because the mean of its divisors is an integer number (15676408068079).

Almost surely, 2^{31352816136157} is an apocalyptic number.

It is an amenable number.

31352816136157 is a deficient number, since it is larger than the sum of its proper divisors (1).

31352816136157 is an equidigital number, since it uses as much as digits as its factorization.

31352816136157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2721600, while the sum is 52.

The spelling of 31352816136157 in words is "thirty-one trillion, three hundred fifty-two billion, eight hundred sixteen million, one hundred thirty-six thousand, one hundred fifty-seven".