22180541 has 4 divisors (see below), whose sum is σ = 22327584. Its totient is φ = 22033500.

The previous prime is 22180517. The next prime is 22180547. The reversal of 22180541 is 14508122.

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 22180541 - 2¹⁸ = 21918397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22180547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73295 + ... + 73596.

It is an arithmetic number, because the mean of its divisors is an integer number (5581896).

Almost surely, 2^22180541 is an apocalyptic number.

It is an amenable number.

22180541 is a deficient number, since it is larger than the sum of its proper divisors (147043).

22180541 is a wasteful number, since it uses less digits than its factorization.

22180541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147042.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 22180541 is about 4709.6221716821. The cubic root of 22180541 is about 280.9683352321.

Adding to 22180541 its reverse (14508122), we get a palindrome (36688663).

It can be divided in two parts, 221 and 80541, that multiplied together give a triangular number (17799561 = T₅₉₆₆).

The spelling of 22180541 in words is "twenty-two million, one hundred eighty thousand, five hundred forty-one".