31350321377 has 2 divisors, whose sum is σ = 31350321378. Its totient is φ = 31350321376.

The previous prime is 31350321329. The next prime is 31350321389. The reversal of 31350321377 is 77312305313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30611351521 + 738969856 = 174961^2 + 27184^2 .

It is an emirp because it is prime and its reverse (77312305313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31350321377 - 2¹⁸ = 31350059233 is a prime.

It is a super-2 number, since 2×31350321377² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31350321397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15675160688 + 15675160689.

It is an arithmetic number, because the mean of its divisors is an integer number (15675160689).

Almost surely, 2^31350321377 is an apocalyptic number.

It is an amenable number.

31350321377 is a deficient number, since it is larger than the sum of its proper divisors (1).

31350321377 is an equidigital number, since it uses as much as digits as its factorization.

31350321377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39690, while the sum is 35.

The spelling of 31350321377 in words is "thirty-one billion, three hundred fifty million, three hundred twenty-one thousand, three hundred seventy-seven".