23217222 has 16 divisors (see below), whose sum is σ = 53068032. Its totient is φ = 6633480.

The previous prime is 23217211. The next prime is 23217247. The reversal of 23217222 is 22271232.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276354 + ... + 276437.

It is an arithmetic number, because the mean of its divisors is an integer number (3316752).

Almost surely, 2^23217222 is an apocalyptic number.

23217222 is an abundant number, since it is smaller than the sum of its proper divisors (29850810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23217222 is a wasteful number, since it uses less digits than its factorization.

23217222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552803.

The product of its digits is 672, while the sum is 21.

The square root of 23217222 is about 4818.4252614314. The cubic root of 23217222 is about 285.2791847175.

Adding to 23217222 its reverse (22271232), we get a palindrome (45488454).

The spelling of 23217222 in words is "twenty-three million, two hundred seventeen thousand, two hundred twenty-two".