22540816 has 20 divisors (see below), whose sum is σ = 44739324. Its totient is φ = 10995200.

The previous prime is 22540811. The next prime is 22540823. The reversal of 22540816 is 61804522.

It can be written as a sum of positive squares in 2 ways, for example, as 8880400 + 13660416 = 2980^2 + 3696^2 .

It is not an unprimeable number, because it can be changed into a prime (22540811) 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, 16525 + ... + 17836.

Almost surely, 2^22540816 is an apocalyptic number.

It is an amenable number.

22540816 is a deficient number, since it is larger than the sum of its proper divisors (22198508).

22540816 is a wasteful number, since it uses less digits than its factorization.

22540816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34410 (or 34404 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 22540816 is about 4747.7169250072. The cubic root of 22540816 is about 282.4814136622.

It can be divided in two parts, 225 and 40816, that added together give a triangular number (41041 = T₂₈₆).

The spelling of 22540816 in words is "twenty-two million, five hundred forty thousand, eight hundred sixteen".