88221717 has 20 divisors (see below), whose sum is σ = 132052140. Its totient is φ = 58696704.

The previous prime is 88221713. The next prime is 88221719. The reversal of 88221717 is 71712288.

It is a happy number.

88221717 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in 2 ways, for example, as 2954961 + 85266756 = 1719^2 + 9234^2 .

It is not a de Polignac number, because 88221717 - 2² = 88221713 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88221713) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 61909 + ... + 63317.

It is an arithmetic number, because the mean of its divisors is an integer number (6602607).

Almost surely, 2^88221717 is an apocalyptic number.

It is an amenable number.

88221717 is a deficient number, since it is larger than the sum of its proper divisors (43830423).

88221717 is a wasteful number, since it uses less digits than its factorization.

88221717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2194 (or 2185 counting only the distinct ones).

The product of its digits is 12544, while the sum is 36.

The square root of 88221717 is about 9392.6416411998. The cubic root of 88221717 is about 445.1692610333.

The spelling of 88221717 in words is "eighty-eight million, two hundred twenty-one thousand, seven hundred seventeen".