42815899 has 8 divisors (see below), whose sum is σ = 49257728. Its totient is φ = 36455400.

The previous prime is 42815879. The next prime is 42815933. The reversal of 42815899 is 99851824.

42815899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42815899 - 2⁹ = 42815387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42815879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19197 + ... + 21310.

It is an arithmetic number, because the mean of its divisors is an integer number (6157216).

Almost surely, 2^42815899 is an apocalyptic number.

42815899 is a deficient number, since it is larger than the sum of its proper divisors (6441829).

42815899 is a wasteful number, since it uses less digits than its factorization.

42815899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40665.

The product of its digits is 207360, while the sum is 46.

The square root of 42815899 is about 6543.3858972248. The cubic root of 42815899 is about 349.8391070021.

The spelling of 42815899 in words is "forty-two million, eight hundred fifteen thousand, eight hundred ninety-nine".