1313353231 has 4 divisors (see below), whose sum is σ = 1313542672. Its totient is φ = 1313163792.

The previous prime is 1313353211. The next prime is 1313353259. The reversal of 1313353231 is 1323533131.

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

It is a cyclic number.

It is not a de Polignac number, because 1313353231 - 2²⁵ = 1279798799 is a prime.

It is a super-2 number, since 2×1313353231² = 3449793418756278722, 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 = 1313353196 and 1313353205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313353211) 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, 83910 + ... + 98323.

It is an arithmetic number, because the mean of its divisors is an integer number (328385668).

Almost surely, 2^1313353231 is an apocalyptic number.

1313353231 is a deficient number, since it is larger than the sum of its proper divisors (189441).

1313353231 is an equidigital number, since it uses as much as digits as its factorization.

1313353231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189440.

The product of its digits is 2430, while the sum is 25.

The square root of 1313353231 is about 36240.2156588506. The cubic root of 1313353231 is about 1095.1169870075.

Adding to 1313353231 its reverse (1323533131), we get a palindrome (2636886362).

The spelling of 1313353231 in words is "one billion, three hundred thirteen million, three hundred fifty-three thousand, two hundred thirty-one".