86181431 has 8 divisors (see below), whose sum is σ = 98709504. Its totient is φ = 73707480.

The previous prime is 86181421. The next prime is 86181443. The reversal of 86181431 is 13418168.

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 86181431 - 2⁶ = 86181367 is a prime.

It is a super-2 number, since 2×86181431² = 14854478098415522, 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 (86181401) 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, 10055 + ... + 16536.

It is an arithmetic number, because the mean of its divisors is an integer number (12338688).

Almost surely, 2^86181431 is an apocalyptic number.

86181431 is a deficient number, since it is larger than the sum of its proper divisors (12528073).

86181431 is a wasteful number, since it uses less digits than its factorization.

86181431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27061.

The product of its digits is 4608, while the sum is 32.

The square root of 86181431 is about 9283.3954456330. The cubic root of 86181431 is about 441.7106802860.

Adding to 86181431 its reverse (13418168), we get a palindrome (99599599).

The spelling of 86181431 in words is "eighty-six million, one hundred eighty-one thousand, four hundred thirty-one".