22153445 has 4 divisors (see below), whose sum is σ = 26584140. Its totient is φ = 17722752.

The previous prime is 22153423. The next prime is 22153451. The reversal of 22153445 is 54435122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13853284 + 8300161 = 3722^2 + 2881^2 .

It is a cyclic number.

It is not a de Polignac number, because 22153445 - 2⁶ = 22153381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2215340 + ... + 2215349.

It is an arithmetic number, because the mean of its divisors is an integer number (6646035).

Almost surely, 2^22153445 is an apocalyptic number.

It is an amenable number.

22153445 is a deficient number, since it is larger than the sum of its proper divisors (4430695).

22153445 is an equidigital number, since it uses as much as digits as its factorization.

22153445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4430694.

The product of its digits is 4800, while the sum is 26.

The square root of 22153445 is about 4706.7446287216. The cubic root of 22153445 is about 280.8538772453.

Adding to 22153445 its reverse (54435122), we get a palindrome (76588567).

The spelling of 22153445 in words is "twenty-two million, one hundred fifty-three thousand, four hundred forty-five".