22516140 has 48 divisors (see below), whose sum is σ = 66366720. Its totient is φ = 5688000.

The previous prime is 22516139. The next prime is 22516141. The reversal of 22516140 is 4161522.

It is an interprime number because it is at equal distance from previous prime (22516139) and next prime (22516141).

It is not an unprimeable number, because it can be changed into a prime (22516141) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8736 + ... + 11015.

It is an arithmetic number, because the mean of its divisors is an integer number (1382640).

Almost surely, 2^22516140 is an apocalyptic number.

22516140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22516140 is an abundant number, since it is smaller than the sum of its proper divisors (43850580).

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

22516140 is a wasteful number, since it uses less digits than its factorization.

22516140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19782 (or 19780 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 22516140 is about 4745.1174906424. The cubic root of 22516140 is about 282.3782961810.

Adding to 22516140 its reverse (4161522), we get a palindrome (26677662).

The spelling of 22516140 in words is "twenty-two million, five hundred sixteen thousand, one hundred forty".