22290423 has 4 divisors (see below), whose sum is σ = 29720568. Its totient is φ = 14860280.

The previous prime is 22290419. The next prime is 22290449. The reversal of 22290423 is 32409222.

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 22290423 - 2² = 22290419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22290393 and 22290402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22490423) 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, 3715068 + ... + 3715073.

It is an arithmetic number, because the mean of its divisors is an integer number (7430142).

Almost surely, 2^22290423 is an apocalyptic number.

22290423 is a deficient number, since it is larger than the sum of its proper divisors (7430145).

22290423 is an equidigital number, since it uses as much as digits as its factorization.

22290423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7430144.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 22290423 is about 4721.2734510935. The cubic root of 22290423 is about 281.4315418545.

Adding to 22290423 its reverse (32409222), we get a palindrome (54699645).

The spelling of 22290423 in words is "twenty-two million, two hundred ninety thousand, four hundred twenty-three".