1231313366 has 32 divisors (see below), whose sum is σ = 2029494528. Its totient is φ = 557752320.

The previous prime is 1231313351. The next prime is 1231313399. The reversal of 1231313366 is 6633131321.

It is a super-2 number, since 2×1231313366² = 3032265210580499912, 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, 200396 + ... + 206448.

It is an arithmetic number, because the mean of its divisors is an integer number (63421704).

Almost surely, 2^1231313366 is an apocalyptic number.

1231313366 is a deficient number, since it is larger than the sum of its proper divisors (798181162).

1231313366 is a wasteful number, since it uses less digits than its factorization.

1231313366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6296.

The product of its digits is 5832, while the sum is 29.

The square root of 1231313366 is about 35090.0750355425. The cubic root of 1231313366 is about 1071.8224875701.

Adding to 1231313366 its reverse (6633131321), we get a palindrome (7864444687).

The spelling of 1231313366 in words is "one billion, two hundred thirty-one million, three hundred thirteen thousand, three hundred sixty-six".