22552821 has 12 divisors (see below), whose sum is σ = 32654700. Its totient is φ = 14999040.

The previous prime is 22552819. The next prime is 22552823. The reversal of 22552821 is 12825522.

It is an interprime number because it is at equal distance from previous prime (22552819) and next prime (22552823).

It can be written as a sum of positive squares in 2 ways, for example, as 10400625 + 12152196 = 3225^2 + 3486^2 .

It is not a de Polignac number, because 22552821 - 2¹ = 22552819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22552823) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1251 + ... + 6831.

It is an arithmetic number, because the mean of its divisors is an integer number (2721225).

Almost surely, 2^22552821 is an apocalyptic number.

It is an amenable number.

22552821 is a deficient number, since it is larger than the sum of its proper divisors (10101879).

22552821 is a wasteful number, since it uses less digits than its factorization.

22552821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6036 (or 6033 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 22552821 is about 4748.9810486040. The cubic root of 22552821 is about 282.5315536322.

The spelling of 22552821 in words is "twenty-two million, five hundred fifty-two thousand, eight hundred twenty-one".