1231340423432 has 64 divisors (see below), whose sum is σ = 2647222266240. Its totient is φ = 525992716800.

The previous prime is 1231340423431. The next prime is 1231340423437. The reversal of 1231340423432 is 2343240431321.

It is not an unprimeable number, because it can be changed into a prime (1231340423431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24056507 + ... + 24107637.

It is an arithmetic number, because the mean of its divisors is an integer number (41362847910).

Almost surely, 2^{1231340423432} is an apocalyptic number.

It is an amenable number.

1231340423432 is an abundant number, since it is smaller than the sum of its proper divisors (1415881842808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231340423432 is a wasteful number, since it uses less digits than its factorization.

1231340423432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52542 (or 52538 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 1231340423432 its reverse (2343240431321), we get a palindrome (3574580854753).

The spelling of 1231340423432 in words is "one trillion, two hundred thirty-one billion, three hundred forty million, four hundred twenty-three thousand, four hundred thirty-two".