22132521 has 20 divisors (see below), whose sum is σ = 35009172. Its totient is φ = 13886208.

The previous prime is 22132501. The next prime is 22132529. The reversal of 22132521 is 12523122.

It can be written as a sum of positive squares in 2 ways, for example, as 10497600 + 11634921 = 3240^2 + 3411^2 .

It is not a de Polignac number, because 22132521 - 2⁶ = 22132457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22132494 and 22132503.

It is not an unprimeable number, because it can be changed into a prime (22132529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6660 + ... + 9413.

Almost surely, 2^22132521 is an apocalyptic number.

It is an amenable number.

22132521 is a deficient number, since it is larger than the sum of its proper divisors (12876651).

22132521 is a wasteful number, since it uses less digits than its factorization.

22132521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16102 (or 16093 counting only the distinct ones).

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

The square root of 22132521 is about 4704.5213359066. The cubic root of 22132521 is about 280.7654269290.

Adding to 22132521 its reverse (12523122), we get a palindrome (34655643).

The spelling of 22132521 in words is "twenty-two million, one hundred thirty-two thousand, five hundred twenty-one".