31307996201 has 2 divisors, whose sum is σ = 31307996202. Its totient is φ = 31307996200.

The previous prime is 31307996143. The next prime is 31307996227. The reversal of 31307996201 is 10269970313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26195746201 + 5112250000 = 161851^2 + 71500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31307996201 is a prime.

It is a super-2 number, since 2×31307996201² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31307996281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15653998100 + 15653998101.

It is an arithmetic number, because the mean of its divisors is an integer number (15653998101).

Almost surely, 2^31307996201 is an apocalyptic number.

It is an amenable number.

31307996201 is a deficient number, since it is larger than the sum of its proper divisors (1).

31307996201 is an equidigital number, since it uses as much as digits as its factorization.

31307996201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 41.

The spelling of 31307996201 in words is "thirty-one billion, three hundred seven million, nine hundred ninety-six thousand, two hundred one".