1310023321 has 4 divisors (see below), whose sum is σ = 1311667812. Its totient is φ = 1308378832.

The previous prime is 1310023303. The next prime is 1310023333. The reversal of 1310023321 is 1233200131.

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 1101509721 + 208513600 = 33189^2 + 14440^2 .

It is a cyclic number.

It is not a de Polignac number, because 1310023321 - 2⁵ = 1310023289 is a prime.

It is a super-2 number, since 2×1310023321² = 3432322203127738082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1310023295 and 1310023304.

It is not an unprimeable number, because it can be changed into a prime (1310023921) 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, 821050 + ... + 822643.

It is an arithmetic number, because the mean of its divisors is an integer number (327916953).

Almost surely, 2^1310023321 is an apocalyptic number.

It is an amenable number.

1310023321 is a deficient number, since it is larger than the sum of its proper divisors (1644491).

1310023321 is an equidigital number, since it uses as much as digits as its factorization.

1310023321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644490.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1310023321 is about 36194.2443076244. The cubic root of 1310023321 is about 1094.1906743197.

Adding to 1310023321 its reverse (1233200131), we get a palindrome (2543223452).

The spelling of 1310023321 in words is "one billion, three hundred ten million, twenty-three thousand, three hundred twenty-one".