42866219 has 4 divisors (see below), whose sum is σ = 46763160. Its totient is φ = 38969280.

The previous prime is 42866171. The next prime is 42866221. The reversal of 42866219 is 91266824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42866219 - 2¹² = 42862123 is a prime.

It is a super-2 number, since 2×42866219² = 3675025462711922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42866419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1948454 + ... + 1948475.

It is an arithmetic number, because the mean of its divisors is an integer number (11690790).

Almost surely, 2^42866219 is an apocalyptic number.

42866219 is a deficient number, since it is larger than the sum of its proper divisors (3896941).

42866219 is a wasteful number, since it uses less digits than its factorization.

42866219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3896940.

The product of its digits is 41472, while the sum is 38.

The square root of 42866219 is about 6547.2298722437. The cubic root of 42866219 is about 349.9761044911.

The spelling of 42866219 in words is "forty-two million, eight hundred sixty-six thousand, two hundred nineteen".