42222245 has 8 divisors (see below), whose sum is σ = 54564216. Its totient is φ = 31179456.

The previous prime is 42222239. The next prime is 42222253. The reversal of 42222245 is 54222224.

It can be written as a sum of positive squares in 4 ways, for example, as 5764801 + 36457444 = 2401^2 + 6038^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42222245 - 2⁸ = 42221989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42222245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324722 + ... + 324851.

It is an arithmetic number, because the mean of its divisors is an integer number (6820527).

Almost surely, 2^42222245 is an apocalyptic number.

It is an amenable number.

42222245 is a deficient number, since it is larger than the sum of its proper divisors (12341971).

42222245 is a wasteful number, since it uses less digits than its factorization.

42222245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649591.

The product of its digits is 2560, while the sum is 23.

The square root of 42222245 is about 6497.8646492521. The cubic root of 42222245 is about 348.2147048916.

Adding to 42222245 its reverse (54222224), we get a palindrome (96444469).

The spelling of 42222245 in words is "forty-two million, two hundred twenty-two thousand, two hundred forty-five".