31213322297 has 4 divisors (see below), whose sum is σ = 31217092596. Its totient is φ = 31209552000.

The previous prime is 31213322291. The next prime is 31213322317. The reversal of 31213322297 is 79222331213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79222331213 = 28579 ⋅2772047.

It can be written as a sum of positive squares in 2 ways, for example, as 25924542121 + 5288780176 = 161011^2 + 72724^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31213322297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31213322291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1872704 + ... + 1889297.

It is an arithmetic number, because the mean of its divisors is an integer number (7804273149).

Almost surely, 2^31213322297 is an apocalyptic number.

It is an amenable number.

31213322297 is a deficient number, since it is larger than the sum of its proper divisors (3770299).

31213322297 is an equidigital number, since it uses as much as digits as its factorization.

31213322297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3770298.

The product of its digits is 27216, while the sum is 35.

The spelling of 31213322297 in words is "thirty-one billion, two hundred thirteen million, three hundred twenty-two thousand, two hundred ninety-seven".