22201992 has 128 divisors (see below), whose sum is σ = 66528000. Its totient is φ = 6842880.

The previous prime is 22201967. The next prime is 22201999. The reversal of 22201992 is 29910222.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (22201999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 203634 + ... + 203742.

It is an arithmetic number, because the mean of its divisors is an integer number (519750).

Almost surely, 2^22201992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22201992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33264000).

22201992 is an abundant number, since it is smaller than the sum of its proper divisors (44326008).

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

22201992 is a wasteful number, since it uses less digits than its factorization.

22201992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 22201992 is about 4711.8989802414. The cubic root of 22201992 is about 281.0588817140.

It can be divided in two parts, 222019 and 92, that added together give a triangular number (222111 = T₆₆₆).

The spelling of 22201992 in words is "twenty-two million, two hundred one thousand, nine hundred ninety-two".