22400525 has 24 divisors (see below), whose sum is σ = 33420480. Its totient is φ = 14549760.

The previous prime is 22400513. The next prime is 22400527. The reversal of 22400525 is 52500422.

It is not a de Polignac number, because 22400525 - 2¹⁸ = 22138381 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22400497 and 22400506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22400527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44 + ... + 6693.

It is an arithmetic number, because the mean of its divisors is an integer number (1392520).

Almost surely, 2^22400525 is an apocalyptic number.

22400525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22400525 is a deficient number, since it is larger than the sum of its proper divisors (11019955).

22400525 is a wasteful number, since it uses less digits than its factorization.

22400525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6773 (or 6768 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 22400525 is about 4732.9192894027. The cubic root of 22400525 is about 281.8941515462.

Adding to 22400525 its reverse (52500422), we get a palindrome (74900947).

The spelling of 22400525 in words is "twenty-two million, four hundred thousand, five hundred twenty-five".