217380074 has 8 divisors (see below), whose sum is σ = 326384100. Its totient is φ = 108585376.

The previous prime is 217380067. The next prime is 217380077. The reversal of 217380074 is 470083712.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 217356049 + 24025 = 14743^2 + 155^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 217380074.

It is not an unprimeable number, because it can be changed into a prime (217380077) 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 3 ways as a sum of consecutive naturals, for example, 49709 + ... + 53904.

Almost surely, 2^217380074 is an apocalyptic number.

217380074 is a deficient number, since it is larger than the sum of its proper divisors (109004026).

217380074 is a wasteful number, since it uses less digits than its factorization.

217380074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104664.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 217380074 is about 14743.8147709472. The cubic root of 217380074 is about 601.2751344302.

The spelling of 217380074 in words is "two hundred seventeen million, three hundred eighty thousand, seventy-four".