42219117 has 16 divisors (see below), whose sum is σ = 64565760. Its totient is φ = 27237600.

The previous prime is 42219091. The next prime is 42219131. The reversal of 42219117 is 71191224.

It is not a de Polignac number, because 42219117 - 2¹⁴ = 42202733 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42219167) 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, 24384 + ... + 26057.

It is an arithmetic number, because the mean of its divisors is an integer number (4035360).

Almost surely, 2^42219117 is an apocalyptic number.

It is an amenable number.

42219117 is a deficient number, since it is larger than the sum of its proper divisors (22346643).

42219117 is a wasteful number, since it uses less digits than its factorization.

42219117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50481 (or 50475 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 42219117 is about 6497.6239503375. The cubic root of 42219117 is about 348.2061056134.

The spelling of 42219117 in words is "forty-two million, two hundred nineteen thousand, one hundred seventeen".