217142059 has 4 divisors (see below), whose sum is σ = 217224640. Its totient is φ = 217059480.

The previous prime is 217142039. The next prime is 217142087. The reversal of 217142059 is 950241712.

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 217142059 - 2¹⁷ = 217010987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 217142059.

It is not an unprimeable number, because it can be changed into a prime (217142039) 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, 37212 + ... + 42649.

It is an arithmetic number, because the mean of its divisors is an integer number (54306160).

Almost surely, 2^217142059 is an apocalyptic number.

217142059 is a deficient number, since it is larger than the sum of its proper divisors (82581).

217142059 is an equidigital number, since it uses as much as digits as its factorization.

217142059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82580.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 217142059 is about 14735.7408704144. The cubic root of 217142059 is about 601.0556037823.

The spelling of 217142059 in words is "two hundred seventeen million, one hundred forty-two thousand, fifty-nine".