31232400430 has 32 divisors (see below), whose sum is σ = 70090375680. Its totient is φ = 9734773920.

The previous prime is 31232400427. The next prime is 31232400443. The reversal of 31232400430 is 3400423213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20280010 + ... + 20281549.

It is an arithmetic number, because the mean of its divisors is an integer number (2190324240).

Almost surely, 2^31232400430 is an apocalyptic number.

31232400430 is an abundant number, since it is smaller than the sum of its proper divisors (38857975250).

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

31232400430 is a wasteful number, since it uses less digits than its factorization.

31232400430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40561584.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 31232400430 its reverse (3400423213), we get a palindrome (34632823643).

The spelling of 31232400430 in words is "thirty-one billion, two hundred thirty-two million, four hundred thousand, four hundred thirty".