22731120 has 120 divisors (see below), whose sum is σ = 77240592. Its totient is φ = 5990400.

The previous prime is 22731089. The next prime is 22731131. The reversal of 22731120 is 2113722.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22731093 and 22731102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94200 + ... + 94440.

Almost surely, 2^22731120 is an apocalyptic number.

22731120 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 22731120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38620296).

22731120 is an abundant number, since it is smaller than the sum of its proper divisors (54509472).

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

22731120 is a wasteful number, since it uses less digits than its factorization.

22731120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 22731120 is about 4767.7164345208. The cubic root of 22731120 is about 283.2741498837.

Adding to 22731120 its reverse (2113722), we get a palindrome (24844842).

The spelling of 22731120 in words is "twenty-two million, seven hundred thirty-one thousand, one hundred twenty".