1231213432 has 32 divisors (see below), whose sum is σ = 2335636800. Its totient is φ = 608400000.

The previous prime is 1231213427. The next prime is 1231213441. The reversal of 1231213432 is 2343121321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 605794 + ... + 607822.

It is an arithmetic number, because the mean of its divisors is an integer number (72988650).

Almost surely, 2^1231213432 is an apocalyptic number.

It is an amenable number.

1231213432 is a deficient number, since it is larger than the sum of its proper divisors (1104423368).

1231213432 is a wasteful number, since it uses less digits than its factorization.

1231213432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2887 (or 2883 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 1231213432 is about 35088.6510427517. The cubic root of 1231213432 is about 1071.7934902384.

Adding to 1231213432 its reverse (2343121321), we get a palindrome (3574334753).

The spelling of 1231213432 in words is "one billion, two hundred thirty-one million, two hundred thirteen thousand, four hundred thirty-two".