86571131 has 4 divisors (see below), whose sum is σ = 88682664. Its totient is φ = 84459600.

The previous prime is 86571109. The next prime is 86571137. The reversal of 86571131 is 13117568.

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

It is a cyclic number.

It is not a de Polignac number, because 86571131 - 2¹⁸ = 86308987 is a prime.

It is a super-2 number, since 2×86571131² = 14989121445238322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86571137) 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, 1055705 + ... + 1055786.

It is an arithmetic number, because the mean of its divisors is an integer number (22170666).

Almost surely, 2^86571131 is an apocalyptic number.

86571131 is a deficient number, since it is larger than the sum of its proper divisors (2111533).

86571131 is a wasteful number, since it uses less digits than its factorization.

86571131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111532.

The product of its digits is 5040, while the sum is 32.

The square root of 86571131 is about 9304.3608592960. The cubic root of 86571131 is about 442.3754632674.

Adding to 86571131 its reverse (13117568), we get a palindrome (99688699).

The spelling of 86571131 in words is "eighty-six million, five hundred seventy-one thousand, one hundred thirty-one".