42223540 has 12 divisors (see below), whose sum is σ = 88669476. Its totient is φ = 16889408.

The previous prime is 42223523. The next prime is 42223543. The reversal of 42223540 is 4532224.

It can be written as a sum of positive squares in 2 ways, for example, as 31945104 + 10278436 = 5652^2 + 3206^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42223543) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1055569 + ... + 1055608.

It is an arithmetic number, because the mean of its divisors is an integer number (7389123).

Almost surely, 2^42223540 is an apocalyptic number.

It is an amenable number.

42223540 is an abundant number, since it is smaller than the sum of its proper divisors (46445936).

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

42223540 is a wasteful number, since it uses less digits than its factorization.

42223540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111186 (or 2111184 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 42223540 is about 6497.9642966086. The cubic root of 42223540 is about 348.2182648905.

Adding to 42223540 its reverse (4532224), we get a palindrome (46755764).

The spelling of 42223540 in words is "forty-two million, two hundred twenty-three thousand, five hundred forty".