22521843 has 12 divisors (see below), whose sum is σ = 32574568. Its totient is φ = 14994720.

The previous prime is 22521823. The next prime is 22521857. The reversal of 22521843 is 34812522.

It is not a de Polignac number, because 22521843 - 2¹⁴ = 22505459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22521803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9471 + ... + 11607.

Almost surely, 2^22521843 is an apocalyptic number.

22521843 is a deficient number, since it is larger than the sum of its proper divisors (10052725).

22521843 is a wasteful number, since it uses less digits than its factorization.

22521843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3314 (or 3311 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 22521843 is about 4745.7183860823. The cubic root of 22521843 is about 282.4021348952.

It can be divided in two parts, 2252 and 1843, that added together give a triangular number (4095 = T₉₀).

The spelling of 22521843 in words is "twenty-two million, five hundred twenty-one thousand, eight hundred forty-three".