220116917 has 2 divisors, whose sum is σ = 220116918. Its totient is φ = 220116916.

The previous prime is 220116899. The next prime is 220116943. The reversal of 220116917 is 719611022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145709041 + 74407876 = 12071^2 + 8626^2 .

It is a cyclic number.

It is not a de Polignac number, because 220116917 - 2⁸ = 220116661 is a prime.

It is equal to p_12128582 and since 220116917 and 12128582 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220116917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220116947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110058458 + 110058459.

It is an arithmetic number, because the mean of its divisors is an integer number (110058459).

Almost surely, 2^220116917 is an apocalyptic number.

It is an amenable number.

220116917 is a deficient number, since it is larger than the sum of its proper divisors (1).

220116917 is an equidigital number, since it uses as much as digits as its factorization.

220116917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 220116917 is about 14836.3377219582. The cubic root of 220116917 is about 603.7879950141.

Adding to 220116917 its reverse (719611022), we get a palindrome (939727939).

The spelling of 220116917 in words is "two hundred twenty million, one hundred sixteen thousand, nine hundred seventeen".