42915819 has 8 divisors (see below), whose sum is σ = 58767760. Its totient is φ = 27837216.

The previous prime is 42915799. The next prime is 42915839. The reversal of 42915819 is 91851924.

It is an interprime number because it is at equal distance from previous prime (42915799) and next prime (42915839).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42915819 - 2¹¹ = 42913771 is a prime.

It is a super-2 number, since 2×42915819² = 3683535040881522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42915839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193204 + ... + 193425.

It is an arithmetic number, because the mean of its divisors is an integer number (7345970).

Almost surely, 2^42915819 is an apocalyptic number.

42915819 is a deficient number, since it is larger than the sum of its proper divisors (15851941).

42915819 is a wasteful number, since it uses less digits than its factorization.

42915819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386669.

The product of its digits is 25920, while the sum is 39.

The square root of 42915819 is about 6551.0166386600. The cubic root of 42915819 is about 350.1110368789. Note that the first 3 decimals are identical.

It can be divided in two parts, 42915 and 819, that added together give a palindrome (43734).

The spelling of 42915819 in words is "forty-two million, nine hundred fifteen thousand, eight hundred nineteen".