31980323269 has 2 divisors, whose sum is σ = 31980323270. Its totient is φ = 31980323268.

The previous prime is 31980323239. The next prime is 31980323281. The reversal of 31980323269 is 96232308913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24999720769 + 6980602500 = 158113^2 + 83550^2 .

It is a cyclic number.

It is not a de Polignac number, because 31980323269 - 2²¹ = 31978226117 is a prime.

It is a super-2 number, since 2×31980323269² (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 (31980323209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15990161634 + 15990161635.

It is an arithmetic number, because the mean of its divisors is an integer number (15990161635).

Almost surely, 2^31980323269 is an apocalyptic number.

It is an amenable number.

31980323269 is a deficient number, since it is larger than the sum of its proper divisors (1).

31980323269 is an equidigital number, since it uses as much as digits as its factorization.

31980323269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 46.

The spelling of 31980323269 in words is "thirty-one billion, nine hundred eighty million, three hundred twenty-three thousand, two hundred sixty-nine".