42220415 has 4 divisors (see below), whose sum is σ = 50664504. Its totient is φ = 33776328.

The previous prime is 42220393. The next prime is 42220463. The reversal of 42220415 is 51402224.

It is a happy number.

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 42220415 - 2⁸ = 42220159 is a prime.

It is a Duffinian number.

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, 4222037 + ... + 4222046.

It is an arithmetic number, because the mean of its divisors is an integer number (12666126).

Almost surely, 2^42220415 is an apocalyptic number.

42220415 is a deficient number, since it is larger than the sum of its proper divisors (8444089).

42220415 is an equidigital number, since it uses as much as digits as its factorization.

42220415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8444088.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 42220415 is about 6497.7238322354. The cubic root of 42220415 is about 348.2096740355.

Adding to 42220415 its reverse (51402224), we get a palindrome (93622639).

The spelling of 42220415 in words is "forty-two million, two hundred twenty thousand, four hundred fifteen".