22540427 has 8 divisors (see below), whose sum is σ = 27742176. Its totient is φ = 17834112.

The previous prime is 22540421. The next prime is 22540451. The reversal of 22540427 is 72404522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22540427 - 2⁴ = 22540411 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22540396 and 22540405.

It is not an unprimeable number, because it can be changed into a prime (22540421) 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, 123758 + ... + 123939.

It is an arithmetic number, because the mean of its divisors is an integer number (3467772).

Almost surely, 2^22540427 is an apocalyptic number.

22540427 is a deficient number, since it is larger than the sum of its proper divisors (5201749).

22540427 is a wasteful number, since it uses less digits than its factorization.

22540427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247717.

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

The square root of 22540427 is about 4747.6759577713. The cubic root of 22540427 is about 282.4797886707.

Adding to 22540427 its reverse (72404522), we get a palindrome (94944949).

The spelling of 22540427 in words is "twenty-two million, five hundred forty thousand, four hundred twenty-seven".