22154445 has 32 divisors (see below), whose sum is σ = 39580800. Its totient is φ = 11757312.

The previous prime is 22154413. The next prime is 22154449. The reversal of 22154445 is 54445122.

22154445 is a `hidden beast` number, since 2 + 215 + 4 + 445 = 666.

It is not a de Polignac number, because 22154445 - 2⁵ = 22154413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22154449) 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 31 ways as a sum of consecutive naturals, for example, 50949 + ... + 51381.

It is an arithmetic number, because the mean of its divisors is an integer number (1236900).

Almost surely, 2^22154445 is an apocalyptic number.

It is an amenable number.

22154445 is a deficient number, since it is larger than the sum of its proper divisors (17426355).

22154445 is a wasteful number, since it uses less digits than its factorization.

22154445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826 (or 820 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 22154445 is about 4706.8508580579. The cubic root of 22154445 is about 280.8581030689.

Adding to 22154445 its reverse (54445122), we get a palindrome (76599567).

The spelling of 22154445 in words is "twenty-two million, one hundred fifty-four thousand, four hundred forty-five".