217207061 has 8 divisors (see below), whose sum is σ = 223886784. Its totient is φ = 210601440.

The previous prime is 217207051. The next prime is 217207063. The reversal of 217207061 is 160702712.

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 217207061 - 2²² = 213012757 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 217207061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217207063) 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, 12545 + ... + 24326.

It is an arithmetic number, because the mean of its divisors is an integer number (27985848).

Almost surely, 2^217207061 is an apocalyptic number.

It is an amenable number.

217207061 is a deficient number, since it is larger than the sum of its proper divisors (6679723).

217207061 is a wasteful number, since it uses less digits than its factorization.

217207061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37051.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 217207061 is about 14737.9462951932. The cubic root of 217207061 is about 601.1155736144.

Adding to 217207061 its reverse (160702712), we get a palindrome (377909773).

The spelling of 217207061 in words is "two hundred seventeen million, two hundred seven thousand, sixty-one".