42220807 has 4 divisors (see below), whose sum is σ = 43017480. Its totient is φ = 41424136.

The previous prime is 42220777. The next prime is 42220819. The reversal of 42220807 is 70802224.

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

It is a cyclic number.

It is not a de Polignac number, because 42220807 - 2¹⁵ = 42188039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42220837) 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, 398257 + ... + 398362.

It is an arithmetic number, because the mean of its divisors is an integer number (10754370).

Almost surely, 2^42220807 is an apocalyptic number.

42220807 is a deficient number, since it is larger than the sum of its proper divisors (796673).

42220807 is an equidigital number, since it uses as much as digits as its factorization.

42220807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796672.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 42220807 is about 6497.7539965745. The cubic root of 42220807 is about 348.2107516956.

The spelling of 42220807 in words is "forty-two million, two hundred twenty thousand, eight hundred seven".