22621225 has 24 divisors (see below), whose sum is σ = 31328352. Its totient is φ = 16060800.

The previous prime is 22621187. The next prime is 22621253. The reversal of 22621225 is 52212622.

22621225 = T₄₁ + T₄₂ + ... + T₅₁₃.

It is a happy number.

It is not a de Polignac number, because 22621225 - 2⁹ = 22620713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22621196 and 22621205.

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, 10869 + ... + 12781.

It is an arithmetic number, because the mean of its divisors is an integer number (1305348).

Almost surely, 2^22621225 is an apocalyptic number.

22621225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22621225 is a deficient number, since it is larger than the sum of its proper divisors (8707127).

22621225 is a wasteful number, since it uses less digits than its factorization.

22621225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977 (or 1972 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 22621225 is about 4756.1775618663. The cubic root of 22621225 is about 282.8169101293.

Adding to 22621225 its reverse (52212622), we get a palindrome (74833847).

The spelling of 22621225 in words is "twenty-two million, six hundred twenty-one thousand, two hundred twenty-five".