1310311331 has 4 divisors (see below), whose sum is σ = 1497498672. Its totient is φ = 1123123992.

The previous prime is 1310311313. The next prime is 1310311337. The reversal of 1310311331 is 1331130131.

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 1310311331 - 2²² = 1306117027 is a prime.

It is a super-2 number, since 2×1310311331² = 3433831568293983122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1310311337) 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, 93593660 + ... + 93593673.

It is an arithmetic number, because the mean of its divisors is an integer number (374374668).

Almost surely, 2^1310311331 is an apocalyptic number.

1310311331 is a deficient number, since it is larger than the sum of its proper divisors (187187341).

1310311331 is an equidigital number, since it uses as much as digits as its factorization.

1310311331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187187340.

The product of its (nonzero) digits is 81, while the sum is 17.

The square root of 1310311331 is about 36198.2227602406. Note that the first 3 decimals coincide. The cubic root of 1310311331 is about 1094.2708547662.

Adding to 1310311331 its reverse (1331130131), we get a palindrome (2641441462).

The spelling of 1310311331 in words is "one billion, three hundred ten million, three hundred eleven thousand, three hundred thirty-one".