22207812 has 48 divisors (see below), whose sum is σ = 57238272. Its totient is φ = 6645280.

The previous prime is 22207799. The next prime is 22207813. The reversal of 22207812 is 21870222.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22207813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9943 + ... + 11969.

It is an arithmetic number, because the mean of its divisors is an integer number (1192464).

Almost surely, 2^22207812 is an apocalyptic number.

22207812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22207812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28619136).

22207812 is an abundant number, since it is smaller than the sum of its proper divisors (35030460).

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

22207812 is a wasteful number, since it uses less digits than its factorization.

22207812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128 (or 2126 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 22207812 is about 4712.5165251700. The cubic root of 22207812 is about 281.0834383661.

The spelling of 22207812 in words is "twenty-two million, two hundred seven thousand, eight hundred twelve".