22103540 has 12 divisors (see below), whose sum is σ = 46417476. Its totient is φ = 8841408.

The previous prime is 22103513. The next prime is 22103561. The reversal of 22103540 is 4530122.

It can be written as a sum of positive squares in 2 ways, for example, as 17272336 + 4831204 = 4156^2 + 2198^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 552569 + ... + 552608.

It is an arithmetic number, because the mean of its divisors is an integer number (3868123).

Almost surely, 2^22103540 is an apocalyptic number.

22103540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22103540 is an abundant number, since it is smaller than the sum of its proper divisors (24313936).

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

22103540 is a wasteful number, since it uses less digits than its factorization.

22103540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105186 (or 1105184 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 22103540 is about 4701.4402048734. The cubic root of 22103540 is about 280.6428257882.

Adding to 22103540 its reverse (4530122), we get a palindrome (26633662).

The spelling of 22103540 in words is "twenty-two million, one hundred three thousand, five hundred forty".