22107540 has 96 divisors (see below), whose sum is σ = 76204800. Its totient is φ = 4663296.

The previous prime is 22107523. The next prime is 22107563. The reversal of 22107540 is 4570122.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3436 + ... + 7484.

It is an arithmetic number, because the mean of its divisors is an integer number (793800).

Almost surely, 2^22107540 is an apocalyptic number.

22107540 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 22107540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38102400).

22107540 is an abundant number, since it is smaller than the sum of its proper divisors (54097260).

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

22107540 is a wasteful number, since it uses less digits than its factorization.

22107540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4081 (or 4079 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 22107540 is about 4701.8655871898. The cubic root of 22107540 is about 280.6597537492.

Adding to 22107540 its reverse (4570122), we get a palindrome (26677662).

The spelling of 22107540 in words is "twenty-two million, one hundred seven thousand, five hundred forty".