25222000 has 40 divisors (see below), whose sum is σ = 60991632. Its totient is φ = 10088000.

The previous prime is 25221997. The next prime is 25222013. The reversal of 25222000 is 22252.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×25222000² = 1272298568000000, which contains 22 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 4306 + ... + 8305.

Almost surely, 2^25222000 is an apocalyptic number.

25222000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25222000 is an abundant number, since it is smaller than the sum of its proper divisors (35769632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25222000 is a wasteful number, since it uses less digits than its factorization.

25222000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12634 (or 12618 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 25222000 is about 5022.1509336140. The cubic root of 25222000 is about 293.2647337288.

Adding to 25222000 its reverse (22252), we get a palindrome (25244252).

The spelling of 25222000 in words is "twenty-five million, two hundred twenty-two thousand".