31303322009 has 2 divisors, whose sum is σ = 31303322010. Its totient is φ = 31303322008.

The previous prime is 31303321967. The next prime is 31303322021. The reversal of 31303322009 is 90022330313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28765177609 + 2538144400 = 169603^2 + 50380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31303322009 is a prime.

It is not a weakly prime, because it can be changed into another prime (31303322059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15651661004 + 15651661005.

It is an arithmetic number, because the mean of its divisors is an integer number (15651661005).

Almost surely, 2^31303322009 is an apocalyptic number.

It is an amenable number.

31303322009 is a deficient number, since it is larger than the sum of its proper divisors (1).

31303322009 is an equidigital number, since it uses as much as digits as its factorization.

31303322009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 26.

The spelling of 31303322009 in words is "thirty-one billion, three hundred three million, three hundred twenty-two thousand, nine".