1251431423232 has 72 divisors (see below), whose sum is σ = 3354944058816. Its totient is φ = 414098927616.

The previous prime is 1251431423219. The next prime is 1251431423299. The reversal of 1251431423232 is 2323241341521.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1251431423193 and 1251431423202.

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, 5841748 + ... + 6052179.

Almost surely, 2^{1251431423232} is an apocalyptic number.

1251431423232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1251431423232 is an abundant number, since it is smaller than the sum of its proper divisors (2103512635584).

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

1251431423232 is a wasteful number, since it uses less digits than its factorization.

1251431423232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11894083 (or 11894069 counting only the distinct ones).

The product of its digits is 34560, while the sum is 33.

Adding to 1251431423232 its reverse (2323241341521), we get a palindrome (3574672764753).

The spelling of 1251431423232 in words is "one trillion, two hundred fifty-one billion, four hundred thirty-one million, four hundred twenty-three thousand, two hundred thirty-two".