22131533 has 4 divisors (see below), whose sum is σ = 22300608. Its totient is φ = 21962460.

The previous prime is 22131521. The next prime is 22131547. The reversal of 22131533 is 33513122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22131533 - 2¹² = 22127437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22131563) 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 3 ways as a sum of consecutive naturals, for example, 84341 + ... + 84602.

It is an arithmetic number, because the mean of its divisors is an integer number (5575152).

Almost surely, 2^22131533 is an apocalyptic number.

It is an amenable number.

22131533 is a deficient number, since it is larger than the sum of its proper divisors (169075).

22131533 is a wasteful number, since it uses less digits than its factorization.

22131533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169074.

The product of its digits is 540, while the sum is 20.

The square root of 22131533 is about 4704.4163293654. The cubic root of 22131533 is about 280.7612490593.

Adding to 22131533 its reverse (33513122), we get a palindrome (55644655).

The spelling of 22131533 in words is "twenty-two million, one hundred thirty-one thousand, five hundred thirty-three".