86481431 has 4 divisors (see below), whose sum is σ = 91568592. Its totient is φ = 81394272.

The previous prime is 86481419. The next prime is 86481463. The reversal of 86481431 is 13418468.

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 86481431 - 2¹⁴ = 86465047 is a prime.

It is a super-2 number, since 2×86481431² = 14958075815615522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86481391 and 86481400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86481401) 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, 2543555 + ... + 2543588.

It is an arithmetic number, because the mean of its divisors is an integer number (22892148).

Almost surely, 2^86481431 is an apocalyptic number.

86481431 is a deficient number, since it is larger than the sum of its proper divisors (5087161).

86481431 is a wasteful number, since it uses less digits than its factorization.

86481431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5087160.

The product of its digits is 18432, while the sum is 35.

The square root of 86481431 is about 9299.5392896638. The cubic root of 86481431 is about 442.2226225087. Note that the first 3 decimals are identical.

Adding to 86481431 its reverse (13418468), we get a palindrome (99899899).

The spelling of 86481431 in words is "eighty-six million, four hundred eighty-one thousand, four hundred thirty-one".