86731431 has 16 divisors (see below), whose sum is σ = 121080960. Its totient is φ = 55149920.

The previous prime is 86731349. The next prime is 86731439. The reversal of 86731431 is 13413768.

It is a cyclic number.

It is not a de Polignac number, because 86731431 - 2¹⁰ = 86730407 is a prime.

It is a super-2 number, since 2×86731431² = 15044682246615522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 86731392 and 86731401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86731439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1216 + ... + 13226.

It is an arithmetic number, because the mean of its divisors is an integer number (7567560).

Almost surely, 2^86731431 is an apocalyptic number.

86731431 is a deficient number, since it is larger than the sum of its proper divisors (34349529).

86731431 is a wasteful number, since it uses less digits than its factorization.

86731431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12126.

The product of its digits is 12096, while the sum is 33.

The square root of 86731431 is about 9312.9711156000. The cubic root of 86731431 is about 442.6483373853.

The spelling of 86731431 in words is "eighty-six million, seven hundred thirty-one thousand, four hundred thirty-one".