22155680 has 48 divisors (see below), whose sum is σ = 53252640. Its totient is φ = 8708352.

The previous prime is 22155677. The next prime is 22155697. The reversal of 22155680 is 8655122.

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, 8267 + ... + 10613.

It is an arithmetic number, because the mean of its divisors is an integer number (1109430).

Almost surely, 2^22155680 is an apocalyptic number.

22155680 is a gapful number since it is divisible by the number (20) 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 22155680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26626320).

22155680 is an abundant number, since it is smaller than the sum of its proper divisors (31096960).

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

22155680 is a wasteful number, since it uses less digits than its factorization.

22155680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2421 (or 2413 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 22155680 is about 4706.9820479794. The cubic root of 22155680 is about 280.8633217855.

The spelling of 22155680 in words is "twenty-two million, one hundred fifty-five thousand, six hundred eighty".