81588059 has 8 divisors (see below), whose sum is σ = 93308160. Its totient is φ = 69884136.

The previous prime is 81588053. The next prime is 81588097. The reversal of 81588059 is 95088518.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81588059 - 2⁴ = 81588043 is a prime.

It is a super-2 number, since 2×81588059² = 13313222742774962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81588053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10052 + ... + 16254.

It is an arithmetic number, because the mean of its divisors is an integer number (11663520).

Almost surely, 2^81588059 is an apocalyptic number.

81588059 is a deficient number, since it is larger than the sum of its proper divisors (11720101).

81588059 is a wasteful number, since it uses less digits than its factorization.

81588059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8089.

The product of its (nonzero) digits is 115200, while the sum is 44.

The square root of 81588059 is about 9032.6108628679. The cubic root of 81588059 is about 433.7194187621.

The spelling of 81588059 in words is "eighty-one million, five hundred eighty-eight thousand, fifty-nine".