31309199999 has 24 divisors (see below), whose sum is σ = 41644147104. Its totient is φ = 22961664000.

The previous prime is 31309199993. The next prime is 31309200011. The reversal of 31309199999 is 99999190313.

It is not a de Polignac number, because 31309199999 - 2⁸ = 31309199743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31309199993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1072802 + ... + 1101599.

It is an arithmetic number, because the mean of its divisors is an integer number (1735172796).

Almost surely, 2^31309199999 is an apocalyptic number.

31309199999 is a deficient number, since it is larger than the sum of its proper divisors (10334947105).

31309199999 is a wasteful number, since it uses less digits than its factorization.

31309199999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174447 (or 2174436 counting only the distinct ones).

The product of its (nonzero) digits is 4782969, while the sum is 62.

The spelling of 31309199999 in words is "thirty-one billion, three hundred nine million, one hundred ninety-nine thousand, nine hundred ninety-nine".