22208023 has 4 divisors (see below), whose sum is σ = 22355248. Its totient is φ = 22060800.

The previous prime is 22208009. The next prime is 22208027. The reversal of 22208023 is 32080222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32080222 = 2 ⋅16040111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22208023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22208027) 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, 73386 + ... + 73687.

It is an arithmetic number, because the mean of its divisors is an integer number (5588812).

Almost surely, 2^22208023 is an apocalyptic number.

22208023 is a deficient number, since it is larger than the sum of its proper divisors (147225).

22208023 is a wasteful number, since it uses less digits than its factorization.

22208023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147224.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 22208023 is about 4712.5389123062. The cubic root of 22208023 is about 281.0843285697.

Adding to 22208023 its reverse (32080222), we get a palindrome (54288245).

The spelling of 22208023 in words is "twenty-two million, two hundred eight thousand, twenty-three".