22131522 has 32 divisors (see below), whose sum is σ = 56208000. Its totient is φ = 6323184.

The previous prime is 22131521. The next prime is 22131547. The reversal of 22131522 is 22513122.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22131495 and 22131504.

It is not an unprimeable number, because it can be changed into a prime (22131521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28897 + ... + 29652.

It is an arithmetic number, because the mean of its divisors is an integer number (1756500).

Almost surely, 2^22131522 is an apocalyptic number.

22131522 is an abundant number, since it is smaller than the sum of its proper divisors (34076478).

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

22131522 is a wasteful number, since it uses less digits than its factorization.

22131522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58567 (or 58561 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 22131522 is about 4704.4151602511. The cubic root of 22131522 is about 280.7612025439.

Adding to 22131522 its reverse (22513122), we get a palindrome (44644644).

The spelling of 22131522 in words is "twenty-two million, one hundred thirty-one thousand, five hundred twenty-two".