22501525 has 6 divisors (see below), whose sum is σ = 27901922. Its totient is φ = 18001200.

The previous prime is 22501517. The next prime is 22501543. The reversal of 22501525 is 52510522.

It can be written as a sum of positive squares in 3 ways, for example, as 5476 + 22496049 = 74^2 + 4743^2 .

It is not a de Polignac number, because 22501525 - 2³ = 22501517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22501496 and 22501505.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 450006 + ... + 450055.

Almost surely, 2^22501525 is an apocalyptic number.

22501525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22501525 is a deficient number, since it is larger than the sum of its proper divisors (5400397).

22501525 is an equidigital number, since it uses as much as digits as its factorization.

22501525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900071 (or 900066 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 22501525 is about 4743.5772366432. The cubic root of 22501525 is about 282.3171866533.

The spelling of 22501525 in words is "twenty-two million, five hundred one thousand, five hundred twenty-five".