1312311995 has 8 divisors (see below), whose sum is σ = 1625573760. Its totient is φ = 1015983360.

The previous prime is 1312311983. The next prime is 1312312033. The reversal of 1312311995 is 5991132131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1312311995 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4233110 + ... + 4233419.

It is an arithmetic number, because the mean of its divisors is an integer number (203196720).

Almost surely, 2^1312311995 is an apocalyptic number.

1312311995 is a deficient number, since it is larger than the sum of its proper divisors (313261765).

1312311995 is an equidigital number, since it uses as much as digits as its factorization.

1312311995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8466565.

The product of its digits is 7290, while the sum is 35.

The square root of 1312311995 is about 36225.8470570393. The cubic root of 1312311995 is about 1094.8275049204.

The spelling of 1312311995 in words is "one billion, three hundred twelve million, three hundred eleven thousand, nine hundred ninety-five".