22601905 has 4 divisors (see below), whose sum is σ = 27122292. Its totient is φ = 18081520.

The previous prime is 22601869. The next prime is 22601987. The reversal of 22601905 is 50910622.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12873744 + 9728161 = 3588^2 + 3119^2 .

It is not a de Polignac number, because 22601905 - 2¹⁵ = 22569137 is a prime.

It is a super-2 number, since 2×22601905² = 1021692219258050, which contains 22 as substring.

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 22601905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2260186 + ... + 2260195.

It is an arithmetic number, because the mean of its divisors is an integer number (6780573).

Almost surely, 2^22601905 is an apocalyptic number.

It is an amenable number.

22601905 is a deficient number, since it is larger than the sum of its proper divisors (4520387).

22601905 is an equidigital number, since it uses as much as digits as its factorization.

22601905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4520386.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 22601905 is about 4754.1460852607. The cubic root of 22601905 is about 282.7363725076.

The spelling of 22601905 in words is "twenty-two million, six hundred one thousand, nine hundred five".