31368402277 has 2 divisors, whose sum is σ = 31368402278. Its totient is φ = 31368402276.

The previous prime is 31368402269. The next prime is 31368402287. The reversal of 31368402277 is 77220486313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30404548161 + 963854116 = 174369^2 + 31046^2 .

It is a cyclic number.

It is not a de Polignac number, because 31368402277 - 2³ = 31368402269 is a prime.

It is a super-2 number, since 2×31368402277² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31368402217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15684201138 + 15684201139.

It is an arithmetic number, because the mean of its divisors is an integer number (15684201139).

Almost surely, 2^31368402277 is an apocalyptic number.

It is an amenable number.

31368402277 is a deficient number, since it is larger than the sum of its proper divisors (1).

31368402277 is an equidigital number, since it uses as much as digits as its factorization.

31368402277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 43.

The spelling of 31368402277 in words is "thirty-one billion, three hundred sixty-eight million, four hundred two thousand, two hundred seventy-seven".