22406523 has 4 divisors (see below), whose sum is σ = 29875368. Its totient is φ = 14937680.

The previous prime is 22406513. The next prime is 22406537. The reversal of 22406523 is 32560422.

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 22406523 - 2¹⁰ = 22405499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22406493 and 22406502.

It is not an unprimeable number, because it can be changed into a prime (22406513) 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, 3734418 + ... + 3734423.

It is an arithmetic number, because the mean of its divisors is an integer number (7468842).

Almost surely, 2^22406523 is an apocalyptic number.

22406523 is a deficient number, since it is larger than the sum of its proper divisors (7468845).

22406523 is an equidigital number, since it uses as much as digits as its factorization.

22406523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7468844.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 22406523 is about 4733.5528939688. The cubic root of 22406523 is about 281.9193094422.

Adding to 22406523 its reverse (32560422), we get a palindrome (54966945).

The spelling of 22406523 in words is "twenty-two million, four hundred six thousand, five hundred twenty-three".