22540473 has 24 divisors (see below), whose sum is σ = 33303816. Its totient is φ = 14688000.

The previous prime is 22540459. The next prime is 22540477. The reversal of 22540473 is 37404522.

It can be written as a sum of positive squares in 4 ways, for example, as 3250809 + 19289664 = 1803^2 + 4392^2 .

It is not a de Polignac number, because 22540473 - 2⁶ = 22540409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22540477) 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, 124443 + ... + 124623.

It is an arithmetic number, because the mean of its divisors is an integer number (1387659).

Almost surely, 2^22540473 is an apocalyptic number.

It is an amenable number.

22540473 is a deficient number, since it is larger than the sum of its proper divisors (10763343).

22540473 is a wasteful number, since it uses less digits than its factorization.

22540473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 22540473 is about 4747.6808022444. The cubic root of 22540473 is about 282.4799808301.

Adding to 22540473 its reverse (37404522), we get a palindrome (59944995).

The spelling of 22540473 in words is "twenty-two million, five hundred forty thousand, four hundred seventy-three".