81596371 has 8 divisors (see below), whose sum is σ = 86022144. Its totient is φ = 77282760.

The previous prime is 81596353. The next prime is 81596377. The reversal of 81596371 is 17369518.

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 81596371 - 2⁹ = 81595859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81596377) 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, 26545 + ... + 29458.

It is an arithmetic number, because the mean of its divisors is an integer number (10752768).

Almost surely, 2^81596371 is an apocalyptic number.

81596371 is a deficient number, since it is larger than the sum of its proper divisors (4425773).

81596371 is a wasteful number, since it uses less digits than its factorization.

81596371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56081.

The product of its digits is 45360, while the sum is 40.

The square root of 81596371 is about 9033.0709617494. The cubic root of 81596371 is about 433.7341470342.

The spelling of 81596371 in words is "eighty-one million, five hundred ninety-six thousand, three hundred seventy-one".