22331905 has 8 divisors (see below), whose sum is σ = 27522792. Its totient is φ = 17382528.

The previous prime is 22331899. The next prime is 22331923. The reversal of 22331905 is 50913322.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6395841 + 15936064 = 2529^2 + 3992^2 .

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 22331905 - 2¹³ = 22323713 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 22331905.

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, 60172 + ... + 60541.

It is an arithmetic number, because the mean of its divisors is an integer number (3440349).

Almost surely, 2^22331905 is an apocalyptic number.

It is an amenable number.

22331905 is a deficient number, since it is larger than the sum of its proper divisors (5190887).

22331905 is a wasteful number, since it uses less digits than its factorization.

22331905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120755.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 22331905 is about 4725.6645035381. The cubic root of 22331905 is about 281.6060130283.

The spelling of 22331905 in words is "twenty-two million, three hundred thirty-one thousand, nine hundred five".