22259525 has 12 divisors (see below), whose sum is σ = 27982212. Its totient is φ = 17562240.

The previous prime is 22259513. The next prime is 22259527. The reversal of 22259525 is 52595222.

It is a Cunningham number, because it is equal to 4718²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 1 + 22259524 = 1^2 + 4718^2 .

It is not a de Polignac number, because 22259525 - 2¹⁰ = 22258501 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22259491 and 22259500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22259527) 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 11 ways as a sum of consecutive naturals, for example, 4274 + ... + 7923.

It is an arithmetic number, because the mean of its divisors is an integer number (2331851).

Almost surely, 2^22259525 is an apocalyptic number.

22259525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22259525 is a deficient number, since it is larger than the sum of its proper divisors (5722687).

22259525 is a wasteful number, since it uses less digits than its factorization.

22259525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12280 (or 12275 counting only the distinct ones).

The product of its digits is 18000, while the sum is 32.

The square root of 22259525 is about 4718.0001059771. Note that the first 3 decimals coincide. The cubic root of 22259525 is about 281.3014457331.

The spelling of 22259525 in words is "twenty-two million, two hundred fifty-nine thousand, five hundred twenty-five".