1231320308 has 48 divisors (see below), whose sum is σ = 2328553920. Its totient is φ = 567834624.

The previous prime is 1231320281. The next prime is 1231320317. The reversal of 1231320308 is 8030231321.

It is a super-2 number, since 2×1231320308² = 3032299401786429728, which contains 22 as substring.

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, 1885310 + ... + 1885962.

It is an arithmetic number, because the mean of its divisors is an integer number (48511540).

Almost surely, 2^1231320308 is an apocalyptic number.

It is an amenable number.

1231320308 is a deficient number, since it is larger than the sum of its proper divisors (1097233612).

1231320308 is a wasteful number, since it uses less digits than its factorization.

1231320308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296 (or 1294 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1231320308 is about 35090.1739522619. The cubic root of 1231320308 is about 1071.8245018360.

Adding to 1231320308 its reverse (8030231321), we get a palindrome (9261551629).

The spelling of 1231320308 in words is "one billion, two hundred thirty-one million, three hundred twenty thousand, three hundred eight".