1312331002 has 4 divisors (see below), whose sum is σ = 1968496506. Its totient is φ = 656165500.

The previous prime is 1312330961. The next prime is 1312331017. The reversal of 1312331002 is 2001332131.

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

It can be written as a sum of positive squares in only one way, i.e., 1246866721 + 65464281 = 35311^2 + 8091^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328082749 + ... + 328082752.

Almost surely, 2^1312331002 is an apocalyptic number.

1312331002 is a deficient number, since it is larger than the sum of its proper divisors (656165504).

1312331002 is an equidigital number, since it uses as much as digits as its factorization.

1312331002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656165503.

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

The square root of 1312331002 is about 36226.1093964008. The cubic root of 1312331002 is about 1094.8327905755.

Adding to 1312331002 its reverse (2001332131), we get a palindrome (3313663133).

The spelling of 1312331002 in words is "one billion, three hundred twelve million, three hundred thirty-one thousand, two".