22431131530 has 64 divisors (see below), whose sum is σ = 43831756800. Its totient is φ = 8238162240.

The previous prime is 22431131521. The next prime is 22431131531. The reversal of 22431131530 is 3513113422.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22431131495 and 22431131504.

It is not an unprimeable number, because it can be changed into a prime (22431131531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 781819 + ... + 810001.

It is an arithmetic number, because the mean of its divisors is an integer number (684871200).

Almost surely, 2^22431131530 is an apocalyptic number.

22431131530 is a deficient number, since it is larger than the sum of its proper divisors (21400625270).

22431131530 is a wasteful number, since it uses less digits than its factorization.

22431131530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28339.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 22431131530 its reverse (3513113422), we get a palindrome (25944244952).

The spelling of 22431131530 in words is "twenty-two billion, four hundred thirty-one million, one hundred thirty-one thousand, five hundred thirty".