31607809241 has 2 divisors, whose sum is σ = 31607809242. Its totient is φ = 31607809240.

The previous prime is 31607809237. The next prime is 31607809291. The reversal of 31607809241 is 14290870613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30904233616 + 703575625 = 175796^2 + 26525^2 .

It is an emirp because it is prime and its reverse (14290870613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31607809241 - 2² = 31607809237 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31607809201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15803904620 + 15803904621.

It is an arithmetic number, because the mean of its divisors is an integer number (15803904621).

Almost surely, 2^31607809241 is an apocalyptic number.

It is an amenable number.

31607809241 is a deficient number, since it is larger than the sum of its proper divisors (1).

31607809241 is an equidigital number, since it uses as much as digits as its factorization.

31607809241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 31607809241 in words is "thirty-one billion, six hundred seven million, eight hundred nine thousand, two hundred forty-one".