13220312231 has 8 divisors (see below), whose sum is σ = 15334435200. Its totient is φ = 11162566008.

The previous prime is 13220312227. The next prime is 13220312249. The reversal of 13220312231 is 13221302231.

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 13220312231 - 2² = 13220312227 is a prime.

It is a super-2 number, since 2×13220312231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220012231) 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, 14093681 + ... + 14094618.

It is an arithmetic number, because the mean of its divisors is an integer number (1916804400).

Almost surely, 2^13220312231 is an apocalyptic number.

13220312231 is a deficient number, since it is larger than the sum of its proper divisors (2114122969).

13220312231 is an equidigital number, since it uses as much as digits as its factorization.

13220312231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28188373.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 13220312231 its reverse (13221302231), we get a palindrome (26441614462).

The spelling of 13220312231 in words is "thirteen billion, two hundred twenty million, three hundred twelve thousand, two hundred thirty-one".