22039225 has 24 divisors (see below), whose sum is σ = 31169880. Its totient is φ = 15313920.

The previous prime is 22039207. The next prime is 22039231. The reversal of 22039225 is 52293022.

It can be written as a sum of positive squares in 12 ways, for example, as 6953769 + 15085456 = 2637^2 + 3884^2 .

It is not a de Polignac number, because 22039225 - 2⁷ = 22039097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 22039225.

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 23 ways as a sum of consecutive naturals, for example, 3531 + ... + 7519.

It is an arithmetic number, because the mean of its divisors is an integer number (1298745).

Almost surely, 2^22039225 is an apocalyptic number.

22039225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22039225 is a deficient number, since it is larger than the sum of its proper divisors (9130655).

22039225 is a wasteful number, since it uses less digits than its factorization.

22039225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4029 (or 4024 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 22039225 is about 4694.5952967215. The cubic root of 22039225 is about 280.3703644835.

The spelling of 22039225 in words is "twenty-two million, thirty-nine thousand, two hundred twenty-five".