42222805 has 4 divisors (see below), whose sum is σ = 50667372. Its totient is φ = 33778240.

The previous prime is 42222793. The next prime is 42222823. The reversal of 42222805 is 50822224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28965924 + 13256881 = 5382^2 + 3641^2 .

It is not a de Polignac number, because 42222805 - 2¹¹ = 42220757 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 42222805.

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, 4222276 + ... + 4222285.

It is an arithmetic number, because the mean of its divisors is an integer number (12666843).

Almost surely, 2^42222805 is an apocalyptic number.

It is an amenable number.

42222805 is a deficient number, since it is larger than the sum of its proper divisors (8444567).

42222805 is an equidigital number, since it uses as much as digits as its factorization.

42222805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8444566.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 42222805 is about 6497.9077401884. The cubic root of 42222805 is about 348.2162443595.

The spelling of 42222805 in words is "forty-two million, two hundred twenty-two thousand, eight hundred five".