22150825 has 12 divisors (see below), whose sum is σ = 27713628. Its totient is φ = 17561600.

The previous prime is 22150811. The next prime is 22150829. The reversal of 22150825 is 52805122.

It can be written as a sum of positive squares in 6 ways, for example, as 5934096 + 16216729 = 2436^2 + 4027^2 .

It is not a de Polignac number, because 22150825 - 2⁹ = 22150313 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22150825.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22150829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1096 + ... + 6745.

It is an arithmetic number, because the mean of its divisors is an integer number (2309469).

Almost surely, 2^22150825 is an apocalyptic number.

22150825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22150825 is a deficient number, since it is larger than the sum of its proper divisors (5562803).

22150825 is a wasteful number, since it uses less digits than its factorization.

22150825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7964 (or 7959 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 22150825 is about 4706.4662964904. The cubic root of 22150825 is about 280.8428049844.

Adding to 22150825 its reverse (52805122), we get a palindrome (74955947).

The spelling of 22150825 in words is "twenty-two million, one hundred fifty thousand, eight hundred twenty-five".