22181153 has 4 divisors (see below), whose sum is σ = 22396608. Its totient is φ = 21965700.

The previous prime is 22181149. The next prime is 22181161. The reversal of 22181153 is 35118122.

It is a happy number.

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 22181153 - 2² = 22181149 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22181953) 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 3 ways as a sum of consecutive naturals, for example, 107573 + ... + 107778.

It is an arithmetic number, because the mean of its divisors is an integer number (5599152).

Almost surely, 2^22181153 is an apocalyptic number.

It is an amenable number.

22181153 is a deficient number, since it is larger than the sum of its proper divisors (215455).

22181153 is a wasteful number, since it uses less digits than its factorization.

22181153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215454.

The product of its digits is 480, while the sum is 23.

The square root of 22181153 is about 4709.6871445989. The cubic root of 22181153 is about 280.9709193446.

Subtracting from 22181153 its sum of digits (23), we obtain a triangular number (22181130 = T₆₆₆₀).

Adding to 22181153 its reverse (35118122), we get a palindrome (57299275).

The spelling of 22181153 in words is "twenty-two million, one hundred eighty-one thousand, one hundred fifty-three".