1312243320 has 64 divisors (see below), whose sum is σ = 3941252640. Its totient is φ = 349529600.

The previous prime is 1312243319. The next prime is 1312243343. The reversal of 1312243320 is 233422131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107110 + ... + 118730.

Almost surely, 2^1312243320 is an apocalyptic number.

1312243320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312243320 is an abundant number, since it is smaller than the sum of its proper divisors (2629009320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1312243320 is a wasteful number, since it uses less digits than its factorization.

1312243320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12576 (or 12572 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1312243320 is about 36224.8991717023. The cubic root of 1312243320 is about 1094.8084066697.

Adding to 1312243320 its reverse (233422131), we get a palindrome (1545665451).

The spelling of 1312243320 in words is "one billion, three hundred twelve million, two hundred forty-three thousand, three hundred twenty".