1313404231 has 4 divisors (see below), whose sum is σ = 1316712952. Its totient is φ = 1310095512.

The previous prime is 1313404223. The next prime is 1313404327. The reversal of 1313404231 is 1324043131.

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 1313404231 - 2³ = 1313404223 is a prime.

It is a super-2 number, since 2×1313404231² = 3450061348017402722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313404531) 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, 1653765 + ... + 1654558.

It is an arithmetic number, because the mean of its divisors is an integer number (329178238).

Almost surely, 2^1313404231 is an apocalyptic number.

1313404231 is a deficient number, since it is larger than the sum of its proper divisors (3308721).

1313404231 is an equidigital number, since it uses as much as digits as its factorization.

1313404231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3308720.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1313404231 is about 36240.9192902167. The cubic root of 1313404231 is about 1095.1311619814.

Adding to 1313404231 its reverse (1324043131), we get a palindrome (2637447362).

The spelling of 1313404231 in words is "one billion, three hundred thirteen million, four hundred four thousand, two hundred thirty-one".