31003231009 has 2 divisors, whose sum is σ = 31003231010. Its totient is φ = 31003231008.

The previous prime is 31003231001. The next prime is 31003231027. The reversal of 31003231009 is 90013230013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29411221009 + 1592010000 = 171497^2 + 39900^2 .

It is a cyclic number.

It is not a de Polignac number, because 31003231009 - 2³ = 31003231001 is a prime.

It is a super-2 number, since 2×31003231009² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31003231001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15501615504 + 15501615505.

It is an arithmetic number, because the mean of its divisors is an integer number (15501615505).

Almost surely, 2^31003231009 is an apocalyptic number.

It is an amenable number.

31003231009 is a deficient number, since it is larger than the sum of its proper divisors (1).

31003231009 is an equidigital number, since it uses as much as digits as its factorization.

31003231009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 22.

The spelling of 31003231009 in words is "thirty-one billion, three million, two hundred thirty-one thousand, nine".