23221206 has 24 divisors (see below), whose sum is σ = 50404224. Its totient is φ = 7726320.

The previous prime is 23221193. The next prime is 23221223. The reversal of 23221206 is 60212232.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15051 + ... + 16521.

It is an arithmetic number, because the mean of its divisors is an integer number (2100176).

Almost surely, 2^23221206 is an apocalyptic number.

23221206 is an abundant number, since it is smaller than the sum of its proper divisors (27183018).

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

23221206 is a wasteful number, since it uses less digits than its factorization.

23221206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2356 (or 2353 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 23221206 is about 4818.8386567720. The cubic root of 23221206 is about 285.2955014452.

Adding to 23221206 its reverse (60212232), we get a palindrome (83433438).

The spelling of 23221206 in words is "twenty-three million, two hundred twenty-one thousand, two hundred six".