1231312232 has 16 divisors (see below), whose sum is σ = 2309104260. Its totient is φ = 615551104.

The previous prime is 1231312217. The next prime is 1231312259. The reversal of 1231312232 is 2322131321.

It can be written as a sum of positive squares in 2 ways, for example, as 776513956 + 454798276 = 27866^2 + 21326^2 .

It is a super-2 number, since 2×1231312232² = 3032259625345643648, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61988 + ... + 79404.

Almost surely, 2^1231312232 is an apocalyptic number.

It is an amenable number.

1231312232 is a deficient number, since it is larger than the sum of its proper divisors (1077792028).

1231312232 is a wasteful number, since it uses less digits than its factorization.

1231312232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26260 (or 26256 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 1231312232 is about 35090.0588771236. The cubic root of 1231312232 is about 1071.8221585320.

Adding to 1231312232 its reverse (2322131321), we get a palindrome (3553443553).

The spelling of 1231312232 in words is "one billion, two hundred thirty-one million, three hundred twelve thousand, two hundred thirty-two".