22540399 has 8 divisors (see below), whose sum is σ = 25826720. Its totient is φ = 19270656.

The previous prime is 22540387. The next prime is 22540409. The reversal of 22540399 is 99304522.

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 22540399 - 2¹³ = 22532207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22540319) 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, 1074 + ... + 6799.

It is an arithmetic number, because the mean of its divisors is an integer number (3228340).

Almost surely, 2^22540399 is an apocalyptic number.

22540399 is a deficient number, since it is larger than the sum of its proper divisors (3286321).

22540399 is an equidigital number, since it uses as much as digits as its factorization.

22540399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8289.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 22540399 is about 4747.6730089592. The cubic root of 22540399 is about 282.4796717040.

The spelling of 22540399 in words is "twenty-two million, five hundred forty thousand, three hundred ninety-nine".