1231523432 has 16 divisors (see below), whose sum is σ = 2340739140. Its totient is φ = 607326336.

The previous prime is 1231523407. The next prime is 1231523443. The reversal of 1231523432 is 2343251321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1162400836 + 69122596 = 34094^2 + 8314^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1053803 + ... + 1054970.

Almost surely, 2^1231523432 is an apocalyptic number.

It is an amenable number.

1231523432 is a deficient number, since it is larger than the sum of its proper divisors (1109215708).

1231523432 is a wasteful number, since it uses less digits than its factorization.

1231523432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2108852 (or 2108848 counting only the distinct ones).

The product of its digits is 4320, while the sum is 26.

The square root of 1231523432 is about 35093.0681474276. The cubic root of 1231523432 is about 1071.8834362195.

Adding to 1231523432 its reverse (2343251321), we get a palindrome (3574774753).

The spelling of 1231523432 in words is "one billion, two hundred thirty-one million, five hundred twenty-three thousand, four hundred thirty-two".