42220571 has 8 divisors (see below), whose sum is σ = 46648224. Its totient is φ = 38008960.

The previous prime is 42220567. The next prime is 42220579. The reversal of 42220571 is 17502224.

It is a happy number.

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 42220571 - 2² = 42220567 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42220579) 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 7 ways as a sum of consecutive naturals, for example, 53600 + ... + 54381.

It is an arithmetic number, because the mean of its divisors is an integer number (5831028).

Almost surely, 2^42220571 is an apocalyptic number.

42220571 is a deficient number, since it is larger than the sum of its proper divisors (4427653).

42220571 is a wasteful number, since it uses less digits than its factorization.

42220571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108021.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 42220571 is about 6497.7358364279. The cubic root of 42220571 is about 348.2101029011.

Adding to 42220571 its reverse (17502224), we get a palindrome (59722795).

The spelling of 42220571 in words is "forty-two million, two hundred twenty thousand, five hundred seventy-one".