22158545 has 16 divisors (see below), whose sum is σ = 28397952. Its totient is φ = 16558080.

The previous prime is 22158527. The next prime is 22158547. The reversal of 22158545 is 54585122.

It is not a de Polignac number, because 22158545 - 2⁶ = 22158481 is a prime.

It is a super-2 number, since 2×22158545² = 982002233034050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22158547) 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 15 ways as a sum of consecutive naturals, for example, 2705 + ... + 7185.

It is an arithmetic number, because the mean of its divisors is an integer number (1774872).

Almost surely, 2^22158545 is an apocalyptic number.

It is an amenable number.

22158545 is a deficient number, since it is larger than the sum of its proper divisors (6239407).

22158545 is a wasteful number, since it uses less digits than its factorization.

22158545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4552.

The product of its digits is 16000, while the sum is 32.

The square root of 22158545 is about 4707.2863732728. The cubic root of 22158545 is about 280.8754276163.

The spelling of 22158545 in words is "twenty-two million, one hundred fifty-eight thousand, five hundred forty-five".