22542865 has 8 divisors (see below), whose sum is σ = 27079848. Its totient is φ = 18015360.

The previous prime is 22542827. The next prime is 22542893. The reversal of 22542865 is 56824522.

It can be written as a sum of positive squares in 4 ways, for example, as 12702096 + 9840769 = 3564^2 + 3137^2 .

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

It is not a de Polignac number, because 22542865 - 2⁹ = 22542353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22542865.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4899 + ... + 8311.

It is an arithmetic number, because the mean of its divisors is an integer number (3384981).

Almost surely, 2^22542865 is an apocalyptic number.

It is an amenable number.

22542865 is a deficient number, since it is larger than the sum of its proper divisors (4536983).

22542865 is a wasteful number, since it uses less digits than its factorization.

22542865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4739.

The product of its digits is 38400, while the sum is 34.

The square root of 22542865 is about 4747.9327080320. The cubic root of 22542865 is about 282.4899727561.

The spelling of 22542865 in words is "twenty-two million, five hundred forty-two thousand, eight hundred sixty-five".