22535812 has 72 divisors (see below), whose sum is σ = 47315016. Its totient is φ = 9345024.

The previous prime is 22535809. The next prime is 22535819. The reversal of 22535812 is 21853522.

It can be written as a sum of positive squares in 12 ways, for example, as 1887876 + 20647936 = 1374^2 + 4544^2 .

It is not an unprimeable number, because it can be changed into a prime (22535819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 425178 + ... + 425230.

It is an arithmetic number, because the mean of its divisors is an integer number (657153).

Almost surely, 2^22535812 is an apocalyptic number.

It is an amenable number.

22535812 is an abundant number, since it is smaller than the sum of its proper divisors (24779204).

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

22535812 is a wasteful number, since it uses less digits than its factorization.

22535812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 122 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 22535812 is about 4747.1899056178. The cubic root of 22535812 is about 282.4605087460.

The spelling of 22535812 in words is "twenty-two million, five hundred thirty-five thousand, eight hundred twelve".