22180542 has 16 divisors (see below), whose sum is σ = 44986752. Its totient is φ = 7289240.

The previous prime is 22180517. The next prime is 22180547. The reversal of 22180542 is 24508122.

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 7 ways as a sum of consecutive naturals, for example, 25608 + ... + 26459.

It is an arithmetic number, because the mean of its divisors is an integer number (2811672).

Almost surely, 2^22180542 is an apocalyptic number.

22180542 is an abundant number, since it is smaller than the sum of its proper divisors (22806210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22180542 is a wasteful number, since it uses less digits than its factorization.

22180542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52143.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 22180542 is about 4709.6222778478. The cubic root of 22180542 is about 280.9683394546.

Adding to 22180542 its reverse (24508122), we get a palindrome (46688664).

It can be divided in two parts, 22180 and 542, that added together give a palindrome (22722).

The spelling of 22180542 in words is "twenty-two million, one hundred eighty thousand, five hundred forty-two".