88216591 has 2 divisors, whose sum is σ = 88216592. Its totient is φ = 88216590.

The previous prime is 88216589. The next prime is 88216619. The reversal of 88216591 is 19561288.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 88216591 - 2¹ = 88216589 is a prime.

It is a super-2 number, since 2×88216591² = 15564333855322562, which contains 22 as substring.

Together with 88216589, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_5119699 and since 88216591 and 5119699 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88216511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44108295 + 44108296.

It is an arithmetic number, because the mean of its divisors is an integer number (44108296).

Almost surely, 2^88216591 is an apocalyptic number.

88216591 is a deficient number, since it is larger than the sum of its proper divisors (1).

88216591 is an equidigital number, since it uses as much as digits as its factorization.

88216591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 40.

The square root of 88216591 is about 9392.3687640552. The cubic root of 88216591 is about 445.1606388863.

The spelling of 88216591 in words is "eighty-eight million, two hundred sixteen thousand, five hundred ninety-one".