22152120 has 64 divisors (see below), whose sum is σ = 66769920. Its totient is φ = 5879424.

The previous prime is 22152113. The next prime is 22152121. The reversal of 22152120 is 2125122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22152120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22152121) 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, 43789 + ... + 44291.

It is an arithmetic number, because the mean of its divisors is an integer number (1043280).

Almost surely, 2^22152120 is an apocalyptic number.

22152120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22152120 is an abundant number, since it is smaller than the sum of its proper divisors (44617800).

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

22152120 is a wasteful number, since it uses less digits than its factorization.

22152120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884 (or 880 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 22152120 is about 4706.6038711581. The cubic root of 22152120 is about 280.8482778332.

Adding to 22152120 its reverse (2125122), we get a palindrome (24277242).

The spelling of 22152120 in words is "twenty-two million, one hundred fifty-two thousand, one hundred twenty".