22525405 has 8 divisors (see below), whose sum is σ = 30892032. Its totient is φ = 15445968.

The previous prime is 22525397. The next prime is 22525411. The reversal of 22525405 is 50452522.

It is a happy number.

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 22525405 - 2³ = 22525397 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 22525405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321757 + ... + 321826.

It is an arithmetic number, because the mean of its divisors is an integer number (3861504).

Almost surely, 2^22525405 is an apocalyptic number.

It is an amenable number.

22525405 is a deficient number, since it is larger than the sum of its proper divisors (8366627).

22525405 is an equidigital number, since it uses as much as digits as its factorization.

22525405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643595.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 22525405 is about 4746.0936568930. The cubic root of 22525405 is about 282.4170221224.

Adding to 22525405 its reverse (50452522), we get a palindrome (72977927).

The spelling of 22525405 in words is "twenty-two million, five hundred twenty-five thousand, four hundred five".