22353021 has 6 divisors (see below), whose sum is σ = 32287710. Its totient is φ = 14902008.

The previous prime is 22352989. The next prime is 22353031. The reversal of 22353021 is 12035322.

It can be written as a sum of positive squares in only one way, i.e., 22184100 + 168921 = 4710^2 + 411^2 .

It is not a de Polignac number, because 22353021 - 2⁵ = 22352989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22352985 and 22353003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22353031) 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 5 ways as a sum of consecutive naturals, for example, 1241826 + ... + 1241843.

It is an arithmetic number, because the mean of its divisors is an integer number (5381285).

Almost surely, 2^22353021 is an apocalyptic number.

It is an amenable number.

22353021 is a deficient number, since it is larger than the sum of its proper divisors (9934689).

22353021 is a wasteful number, since it uses less digits than its factorization.

22353021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2483675 (or 2483672 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 22353021 is about 4727.8981588016. The cubic root of 22353021 is about 281.6947428724.

Adding to 22353021 its reverse (12035322), we get a palindrome (34388343).

The spelling of 22353021 in words is "twenty-two million, three hundred fifty-three thousand, twenty-one".