22500040 has 16 divisors (see below), whose sum is σ = 50625180. Its totient is φ = 9000000.

The previous prime is 22500029. The next prime is 22500053. The reversal of 22500040 is 4000522.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20268004 + 2232036 = 4502^2 + 1494^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281211 + ... + 281290.

Almost surely, 2^22500040 is an apocalyptic number.

22500040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22500040 is an abundant number, since it is smaller than the sum of its proper divisors (28125140).

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

22500040 is a wasteful number, since it uses less digits than its factorization.

22500040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562512 (or 562508 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 22500040 is about 4743.4207066209. The cubic root of 22500040 is about 282.3109759595.

Adding to 22500040 its reverse (4000522), we get a palindrome (26500562).

It can be divided in two parts, 225000 and 40, that multiplied together give a square (9000000 = 3000²).

The spelling of 22500040 in words is "twenty-two million, five hundred thousand, forty".