1312312133 has 16 divisors (see below), whose sum is σ = 1471684032. Its totient is φ = 1159824000.

The previous prime is 1312312129. The next prime is 1312312139. The reversal of 1312312133 is 3312132131.

It is a cyclic number.

It is not a de Polignac number, because 1312312133 - 2² = 1312312129 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312312139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127178 + ... + 137108.

It is an arithmetic number, because the mean of its divisors is an integer number (91980252).

Almost surely, 2^1312312133 is an apocalyptic number.

It is an amenable number.

1312312133 is a deficient number, since it is larger than the sum of its proper divisors (159371899).

1312312133 is a wasteful number, since it uses less digits than its factorization.

1312312133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10276.

The product of its digits is 324, while the sum is 20.

The square root of 1312312133 is about 36225.8489617566. The cubic root of 1312312133 is about 1094.8275432970.

Adding to 1312312133 its reverse (3312132131), we get a palindrome (4624444264).

The spelling of 1312312133 in words is "one billion, three hundred twelve million, three hundred twelve thousand, one hundred thirty-three".