22231206 has 64 divisors (see below), whose sum is σ = 53300160. Its totient is φ = 6842880.

The previous prime is 22231199. The next prime is 22231219. The reversal of 22231206 is 60213222.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55800 + ... + 56196.

It is an arithmetic number, because the mean of its divisors is an integer number (832815).

Almost surely, 2^22231206 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22231206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26650080).

22231206 is an abundant number, since it is smaller than the sum of its proper divisors (31068954).

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

22231206 is a wasteful number, since it uses less digits than its factorization.

22231206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486 (or 480 counting only the distinct ones).

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

The square root of 22231206 is about 4714.9979851533. The cubic root of 22231206 is about 281.1821027212.

Adding to 22231206 its reverse (60213222), we get a palindrome (82444428).

The spelling of 22231206 in words is "twenty-two million, two hundred thirty-one thousand, two hundred six".