22181598 has 24 divisors (see below), whose sum is σ = 48384336. Its totient is φ = 7344000.

The previous prime is 22181597. The next prime is 22181629. The reversal of 22181598 is 89518122.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22181597) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1363 + ... + 6798.

It is an arithmetic number, because the mean of its divisors is an integer number (2016014).

Almost surely, 2^22181598 is an apocalyptic number.

22181598 is an abundant number, since it is smaller than the sum of its proper divisors (26202738).

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

22181598 is a wasteful number, since it uses less digits than its factorization.

22181598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8320 (or 8317 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 22181598 is about 4709.7343874151. The cubic root of 22181598 is about 280.9727982855.

The spelling of 22181598 in words is "twenty-two million, one hundred eighty-one thousand, five hundred ninety-eight".