86431551 has 8 divisors (see below), whose sum is σ = 121307520. Its totient is φ = 54588312.

The previous prime is 86431537. The next prime is 86431561. The reversal of 86431551 is 15513468.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 86431551 - 2⁶ = 86431487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86431561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 758115 + ... + 758228.

It is an arithmetic number, because the mean of its divisors is an integer number (15163440).

Almost surely, 2^86431551 is an apocalyptic number.

86431551 is a deficient number, since it is larger than the sum of its proper divisors (34875969).

86431551 is a wasteful number, since it uses less digits than its factorization.

86431551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516365.

The product of its digits is 14400, while the sum is 33.

The square root of 86431551 is about 9296.8570495625. The cubic root of 86431551 is about 442.1375857313.

The spelling of 86431551 in words is "eighty-six million, four hundred thirty-one thousand, five hundred fifty-one".