22131530 has 16 divisors (see below), whose sum is σ = 39917664. Its totient is φ = 8834640.

The previous prime is 22131521. The next prime is 22131547. The reversal of 22131530 is 3513122.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22131499 and 22131508.

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, 3665 + ... + 7595.

It is an arithmetic number, because the mean of its divisors is an integer number (2494854).

Almost surely, 2^22131530 is an apocalyptic number.

22131530 is a deficient number, since it is larger than the sum of its proper divisors (17786134).

22131530 is a wasteful number, since it uses less digits than its factorization.

22131530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4501.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 22131530 is about 4704.4160105161. The cubic root of 22131530 is about 280.7612363733.

Adding to 22131530 its reverse (3513122), we get a palindrome (25644652).

The spelling of 22131530 in words is "twenty-two million, one hundred thirty-one thousand, five hundred thirty".