22000025 has 6 divisors (see below), whose sum is σ = 27280062. Its totient is φ = 17600000.

The previous prime is 22000021. The next prime is 22000031. The reversal of 22000025 is 52000022.

It can be written as a sum of positive squares in 3 ways, for example, as 6255001 + 15745024 = 2501^2 + 3968^2 .

It is not a de Polignac number, because 22000025 - 2² = 22000021 is a prime.

It is a super-2 number, since 2×22000025² = 968002200001250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22000021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 439976 + ... + 440025.

It is an arithmetic number, because the mean of its divisors is an integer number (4546677).

Almost surely, 2^22000025 is an apocalyptic number.

22000025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22000025 is a deficient number, since it is larger than the sum of its proper divisors (5280037).

22000025 is an equidigital number, since it uses as much as digits as its factorization.

22000025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880011 (or 880006 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 22000025 is about 4690.4184248316. The cubic root of 22000025 is about 280.2040392034.

Adding to 22000025 its reverse (52000022), we get a palindrome (74000047).

The spelling of 22000025 in words is "twenty-two million, twenty-five", and thus it is an aban number and an uban number.