22213523 has 4 divisors (see below), whose sum is σ = 22326480. Its totient is φ = 22100568.

The previous prime is 22213517. The next prime is 22213537. The reversal of 22213523 is 32531222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22213523 - 2²⁴ = 5436307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22213495 and 22213504.

It is not an unprimeable number, because it can be changed into a prime (22213573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56183 + ... + 56576.

It is an arithmetic number, because the mean of its divisors is an integer number (5581620).

Almost surely, 2^22213523 is an apocalyptic number.

22213523 is a deficient number, since it is larger than the sum of its proper divisors (112957).

22213523 is a wasteful number, since it uses less digits than its factorization.

22213523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112956.

The product of its digits is 720, while the sum is 20.

The square root of 22213523 is about 4713.1224257386. The cubic root of 22213523 is about 281.1075309382.

Adding to 22213523 its reverse (32531222), we get a palindrome (54744745).

The spelling of 22213523 in words is "twenty-two million, two hundred thirteen thousand, five hundred twenty-three".