22864539 has 4 divisors (see below), whose sum is σ = 30486056. Its totient is φ = 15243024.

The previous prime is 22864537. The next prime is 22864561. The reversal of 22864539 is 93546822.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 22864539 - 2¹ = 22864537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22864497 and 22864506.

It is not an unprimeable number, because it can be changed into a prime (22864531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3810754 + ... + 3810759.

It is an arithmetic number, because the mean of its divisors is an integer number (7621514).

Almost surely, 2^22864539 is an apocalyptic number.

22864539 is a deficient number, since it is larger than the sum of its proper divisors (7621517).

22864539 is an equidigital number, since it uses as much as digits as its factorization.

22864539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7621516.

The product of its digits is 103680, while the sum is 39.

The square root of 22864539 is about 4781.6878819095. The cubic root of 22864539 is about 283.8272895214.

The spelling of 22864539 in words is "twenty-two million, eight hundred sixty-four thousand, five hundred thirty-nine".