22431312313 has 8 divisors (see below), whose sum is σ = 22687390440. Its totient is φ = 22175324160.

The previous prime is 22431312251. The next prime is 22431312317. The reversal of 22431312313 is 31321313422.

It can be written as a sum of positive squares in 4 ways, for example, as 7781356944 + 14649955369 = 88212^2 + 121037^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22431312313 - 2⁹ = 22431311801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22431312317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 566193 + ... + 604513.

It is an arithmetic number, because the mean of its divisors is an integer number (2835923805).

Almost surely, 2^22431312313 is an apocalyptic number.

It is an amenable number.

22431312313 is a deficient number, since it is larger than the sum of its proper divisors (256078127).

22431312313 is an equidigital number, since it uses as much as digits as its factorization.

22431312313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44987.

The product of its digits is 2592, while the sum is 25.

Adding to 22431312313 its reverse (31321313422), we get a palindrome (53752625735).

The spelling of 22431312313 in words is "twenty-two billion, four hundred thirty-one million, three hundred twelve thousand, three hundred thirteen".