86523581 has 8 divisors (see below), whose sum is σ = 87246720. Its totient is φ = 85803952.

The previous prime is 86523509. The next prime is 86523589. The reversal of 86523581 is 18532568.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86523581 is a prime.

It is a super-2 number, since 2×86523581² = 14972660138127122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86523589) 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, 70136 + ... + 71358.

It is an arithmetic number, because the mean of its divisors is an integer number (10905840).

Almost surely, 2^86523581 is an apocalyptic number.

It is an amenable number.

86523581 is a deficient number, since it is larger than the sum of its proper divisors (723139).

86523581 is a wasteful number, since it uses less digits than its factorization.

86523581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755.

The product of its digits is 57600, while the sum is 38.

The square root of 86523581 is about 9301.8052548954. The cubic root of 86523581 is about 442.2944554864.

The spelling of 86523581 in words is "eighty-six million, five hundred twenty-three thousand, five hundred eighty-one".