86011581 has 8 divisors (see below), whose sum is σ = 115259200. Its totient is φ = 57052512.

The previous prime is 86011561. The next prime is 86011603. The reversal of 86011581 is 18511068.

It is a happy number.

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

It is not a de Polignac number, because 86011581 - 2⁹ = 86011069 is a prime.

It is a super-2 number, since 2×86011581² = 14795984132239122, 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 (86011501) 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, 71440 + ... + 72633.

It is an arithmetic number, because the mean of its divisors is an integer number (14407400).

Almost surely, 2^86011581 is an apocalyptic number.

It is an amenable number.

86011581 is a deficient number, since it is larger than the sum of its proper divisors (29247619).

86011581 is a wasteful number, since it uses less digits than its factorization.

86011581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144275.

The product of its (nonzero) digits is 1920, while the sum is 30.

The square root of 86011581 is about 9274.2428801493. The cubic root of 86011581 is about 441.4203087624.

The spelling of 86011581 in words is "eighty-six million, eleven thousand, five hundred eighty-one".