1313223331 has 4 divisors (see below), whose sum is σ = 1500826672. Its totient is φ = 1125619992.

The previous prime is 1313223319. The next prime is 1313223337. The reversal of 1313223331 is 1333223131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1333223131 = 5639 ⋅236429.

It is not a de Polignac number, because 1313223331 - 2²⁷ = 1179005603 is a prime.

It is a super-2 number, since 2×1313223331² = 3449111034165471122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313223337) 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, 93801660 + ... + 93801673.

It is an arithmetic number, because the mean of its divisors is an integer number (375206668).

Almost surely, 2^1313223331 is an apocalyptic number.

1313223331 is a deficient number, since it is larger than the sum of its proper divisors (187603341).

1313223331 is an equidigital number, since it uses as much as digits as its factorization.

1313223331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187603340.

The product of its digits is 972, while the sum is 22.

The square root of 1313223331 is about 36238.4234066550. The cubic root of 1313223331 is about 1095.0808808573.

Adding to 1313223331 its reverse (1333223131), we get a palindrome (2646446462).

It can be divided in two parts, 13132 and 23331, that added together give a palindrome (36463).

The spelling of 1313223331 in words is "one billion, three hundred thirteen million, two hundred twenty-three thousand, three hundred thirty-one".