85880581 has 4 divisors (see below), whose sum is σ = 85963500. Its totient is φ = 85797664.

The previous prime is 85880579. The next prime is 85880611. The reversal of 85880581 is 18508858.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60980481 + 24900100 = 7809^2 + 4990^2 .

It is a cyclic number.

It is not a de Polignac number, because 85880581 - 2¹ = 85880579 is a prime.

It is a super-2 number, since 2×85880581² = 14750948385795122, 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 (85880381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39886 + ... + 41983.

It is an arithmetic number, because the mean of its divisors is an integer number (21490875).

Almost surely, 2^85880581 is an apocalyptic number.

It is an amenable number.

85880581 is a deficient number, since it is larger than the sum of its proper divisors (82919).

85880581 is a wasteful number, since it uses less digits than its factorization.

85880581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82918.

The product of its (nonzero) digits is 102400, while the sum is 43.

The square root of 85880581 is about 9267.1776178079. The cubic root of 85880581 is about 441.1960930542.

The spelling of 85880581 in words is "eighty-five million, eight hundred eighty thousand, five hundred eighty-one".