42231345 has 16 divisors (see below), whose sum is σ = 72768192. Its totient is φ = 20790720.

The previous prime is 42231323. The next prime is 42231347. The reversal of 42231345 is 54313224.

It is not a de Polignac number, because 42231345 - 2¹⁷ = 42100273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42231347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108091 + ... + 108480.

It is an arithmetic number, because the mean of its divisors is an integer number (4548012).

Almost surely, 2^42231345 is an apocalyptic number.

It is an amenable number.

42231345 is a deficient number, since it is larger than the sum of its proper divisors (30536847).

42231345 is a wasteful number, since it uses less digits than its factorization.

42231345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216592.

The product of its digits is 2880, while the sum is 24.

The square root of 42231345 is about 6498.5648415631. The cubic root of 42231345 is about 348.2397195586.

Adding to 42231345 its reverse (54313224), we get a palindrome (96544569).

The spelling of 42231345 in words is "forty-two million, two hundred thirty-one thousand, three hundred forty-five".