42231217 has 4 divisors (see below), whose sum is σ = 48264256. Its totient is φ = 36198180.

The previous prime is 42231191. The next prime is 42231223. The reversal of 42231217 is 71213224.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42231217 - 2¹¹ = 42229169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42231257) 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, 3016509 + ... + 3016522.

It is an arithmetic number, because the mean of its divisors is an integer number (12066064).

Almost surely, 2^42231217 is an apocalyptic number.

It is an amenable number.

42231217 is a deficient number, since it is larger than the sum of its proper divisors (6033039).

42231217 is an equidigital number, since it uses as much as digits as its factorization.

42231217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6033038.

The product of its digits is 672, while the sum is 22.

The square root of 42231217 is about 6498.5549932273. The cubic root of 42231217 is about 348.2393677289.

The spelling of 42231217 in words is "forty-two million, two hundred thirty-one thousand, two hundred seventeen".