42216815 has 8 divisors (see below), whose sum is σ = 52029600. Its totient is φ = 32860512.

The previous prime is 42216809. The next prime is 42216817. The reversal of 42216815 is 51861224.

42216815 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 42216815 - 2⁶ = 42216751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42216817) 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, 113915 + ... + 114284.

It is an arithmetic number, because the mean of its divisors is an integer number (6503700).

Almost surely, 2^42216815 is an apocalyptic number.

42216815 is a deficient number, since it is larger than the sum of its proper divisors (9812785).

42216815 is a wasteful number, since it uses less digits than its factorization.

42216815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228241.

The product of its digits is 3840, while the sum is 29.

The square root of 42216815 is about 6497.4468062463. The cubic root of 42216815 is about 348.1997768451.

The spelling of 42216815 in words is "forty-two million, two hundred sixteen thousand, eight hundred fifteen".