22540472 has 32 divisors (see below), whose sum is σ = 44123520. Its totient is φ = 10782720.

The previous prime is 22540459. The next prime is 22540477. The reversal of 22540472 is 27404522.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 23588 + ... + 24524.

It is an arithmetic number, because the mean of its divisors is an integer number (1378860).

Almost surely, 2^22540472 is an apocalyptic number.

It is an amenable number.

22540472 is a deficient number, since it is larger than the sum of its proper divisors (21583048).

22540472 is a wasteful number, since it uses less digits than its factorization.

22540472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071 (or 1067 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 22540472 is about 4747.6806969298. The cubic root of 22540472 is about 282.4799766527.

Adding to 22540472 its reverse (27404522), we get a palindrome (49944994).

The spelling of 22540472 in words is "twenty-two million, five hundred forty thousand, four hundred seventy-two".