22105825 has 24 divisors (see below), whose sum is σ = 31872960. Its totient is φ = 14894400.

The previous prime is 22105817. The next prime is 22105841. The reversal of 22105825 is 52850122.

It is not a de Polignac number, because 22105825 - 2³ = 22105817 is a prime.

It is a super-4 number, since 4×22105825⁴ (a number of 30 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 22105825.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9255 + ... + 11395.

It is an arithmetic number, because the mean of its divisors is an integer number (1328040).

Almost surely, 2^22105825 is an apocalyptic number.

22105825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22105825 is a deficient number, since it is larger than the sum of its proper divisors (9767135).

22105825 is a wasteful number, since it uses less digits than its factorization.

22105825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217 (or 2212 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 22105825 is about 4701.6832092348. The cubic root of 22105825 is about 280.6524961360.

Adding to 22105825 its reverse (52850122), we get a palindrome (74955947).

The spelling of 22105825 in words is "twenty-two million, one hundred five thousand, eight hundred twenty-five".