22251213 has 16 divisors (see below), whose sum is σ = 33192000. Its totient is φ = 14731920.

The previous prime is 22251197. The next prime is 22251217. The reversal of 22251213 is 31215222.

It is not a de Polignac number, because 22251213 - 2⁴ = 22251197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22251217) 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 15 ways as a sum of consecutive naturals, for example, 1258 + ... + 6788.

It is an arithmetic number, because the mean of its divisors is an integer number (2074500).

Almost surely, 2^22251213 is an apocalyptic number.

It is an amenable number.

22251213 is a deficient number, since it is larger than the sum of its proper divisors (10940787).

22251213 is a wasteful number, since it uses less digits than its factorization.

22251213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5689 (or 5683 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 22251213 is about 4717.1191420188. The cubic root of 22251213 is about 281.2664274849.

Adding to 22251213 its reverse (31215222), we get a palindrome (53466435).

The spelling of 22251213 in words is "twenty-two million, two hundred fifty-one thousand, two hundred thirteen".