22161120 has 96 divisors (see below), whose sum is σ = 70525728. Its totient is φ = 5849088.

The previous prime is 22161109. The next prime is 22161131. The reversal of 22161120 is 2116122.

22161120 is nontrivially palindromic in base 14.

It is an interprime number because it is at equal distance from previous prime (22161109) and next prime (22161131).

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×22161120² = 982230479308800, which contains 22 as substring.

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 22161120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65592 + ... + 65928.

It is an arithmetic number, because the mean of its divisors is an integer number (734643).

Almost surely, 2^22161120 is an apocalyptic number.

22161120 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 22161120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35262864).

22161120 is an abundant number, since it is smaller than the sum of its proper divisors (48364608).

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

22161120 is a wasteful number, since it uses less digits than its factorization.

22161120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 22161120 is about 4707.5598774737. The cubic root of 22161120 is about 280.8863071846.

Adding to 22161120 its reverse (2116122), we get a palindrome (24277242).

The spelling of 22161120 in words is "twenty-two million, one hundred sixty-one thousand, one hundred twenty".