31213322265677 has 2 divisors, whose sum is σ = 31213322265678. Its totient is φ = 31213322265676.

The previous prime is 31213322265637. The next prime is 31213322265701. The reversal of 31213322265677 is 77656222331213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28428208539721 + 2785113725956 = 5331811^2 + 1668866^2 .

It is a cyclic number.

It is not a de Polignac number, because 31213322265677 - 2¹⁶ = 31213322200141 is a prime.

It is a super-2 number, since 2×31213322265677² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31213322265637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606661132838 + 15606661132839.

It is an arithmetic number, because the mean of its divisors is an integer number (15606661132839).

Almost surely, 2^{31213322265677} is an apocalyptic number.

It is an amenable number.

31213322265677 is a deficient number, since it is larger than the sum of its proper divisors (1).

31213322265677 is an equidigital number, since it uses as much as digits as its factorization.

31213322265677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 50.

The spelling of 31213322265677 in words is "thirty-one trillion, two hundred thirteen billion, three hundred twenty-two million, two hundred sixty-five thousand, six hundred seventy-seven".