22154045 has 4 divisors (see below), whose sum is σ = 26584860. Its totient is φ = 17723232.

The previous prime is 22154039. The next prime is 22154051. The reversal of 22154045 is 54045122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54045122 = 2 ⋅27022561.

It is an interprime number because it is at equal distance from previous prime (22154039) and next prime (22154051).

It can be written as a sum of positive squares in 2 ways, for example, as 9572836 + 12581209 = 3094^2 + 3547^2 .

It is a cyclic number.

It is not a de Polignac number, because 22154045 - 2¹² = 22149949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22154045.

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, 2215400 + ... + 2215409.

It is an arithmetic number, because the mean of its divisors is an integer number (6646215).

Almost surely, 2^22154045 is an apocalyptic number.

It is an amenable number.

22154045 is a deficient number, since it is larger than the sum of its proper divisors (4430815).

22154045 is an equidigital number, since it uses as much as digits as its factorization.

22154045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4430814.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 22154045 is about 4706.8083666111. The cubic root of 22154045 is about 280.8564127547.

Adding to 22154045 its reverse (54045122), we get a palindrome (76199167).

The spelling of 22154045 in words is "twenty-two million, one hundred fifty-four thousand, forty-five".