42243999 has 16 divisors (see below), whose sum is σ = 64538880. Its totient is φ = 24076800.

The previous prime is 42243989. The next prime is 42244001. The reversal of 42243999 is 99934224.

It is not a de Polignac number, because 42243999 - 2⁴ = 42243983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42243999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42243959) 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, 6399 + ... + 11199.

It is an arithmetic number, because the mean of its divisors is an integer number (4033680).

Almost surely, 2^42243999 is an apocalyptic number.

42243999 is a deficient number, since it is larger than the sum of its proper divisors (22294881).

42243999 is a wasteful number, since it uses less digits than its factorization.

42243999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5230.

The product of its digits is 139968, while the sum is 42.

The square root of 42243999 is about 6499.5383682228. The cubic root of 42243999 is about 348.2744977181.

The spelling of 42243999 in words is "forty-two million, two hundred forty-three thousand, nine hundred ninety-nine".