31322332313 has 4 divisors (see below), whose sum is σ = 31371197748. Its totient is φ = 31273466880.

The previous prime is 31322332291. The next prime is 31322332339. The reversal of 31322332313 is 31323322313.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29706935449 + 1615396864 = 172357^2 + 40192^2 .

It is a cyclic number.

It is not a de Polignac number, because 31322332313 - 2¹² = 31322328217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31322332343) 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, 24431756 + ... + 24433037.

It is an arithmetic number, because the mean of its divisors is an integer number (7842799437).

Almost surely, 2^31322332313 is an apocalyptic number.

It is an amenable number.

31322332313 is a deficient number, since it is larger than the sum of its proper divisors (48865435).

31322332313 is an equidigital number, since it uses as much as digits as its factorization.

31322332313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48865434.

The product of its digits is 5832, while the sum is 26.

Adding to 31322332313 its reverse (31323322313), we get a palindrome (62645654626).

The spelling of 31322332313 in words is "thirty-one billion, three hundred twenty-two million, three hundred thirty-two thousand, three hundred thirteen".