1320312231 has 40 divisors (see below), whose sum is σ = 2257035264. Its totient is φ = 753474960.

The previous prime is 1320312221. The next prime is 1320312233. The reversal of 1320312231 is 1322130231.

1320312231 is a `hidden beast` number, since 1 + 320 + 312 + 2 + 31 = 666.

It is not a de Polignac number, because 1320312231 - 2⁵ = 1320312199 is a prime.

It is a super-2 number, since 2×1320312231² = 3486448774656394722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320312233) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 833266 + ... + 834848.

Almost surely, 2^1320312231 is an apocalyptic number.

1320312231 is a deficient number, since it is larger than the sum of its proper divisors (936723033).

1320312231 is a wasteful number, since it uses less digits than its factorization.

1320312231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3073 (or 3064 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1320312231 is about 36336.1009328189. The cubic root of 1320312231 is about 1097.0477949121.

Adding to 1320312231 its reverse (1322130231), we get a palindrome (2642442462).

The spelling of 1320312231 in words is "one billion, three hundred twenty million, three hundred twelve thousand, two hundred thirty-one".