86231551 has 4 divisors (see below), whose sum is σ = 98550352. Its totient is φ = 73912752.

The previous prime is 86231533. The next prime is 86231573. The reversal of 86231551 is 15513268.

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 86231551 - 2¹³ = 86223359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86231501) 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 3 ways as a sum of consecutive naturals, for example, 6159390 + ... + 6159403.

It is an arithmetic number, because the mean of its divisors is an integer number (24637588).

Almost surely, 2^86231551 is an apocalyptic number.

86231551 is a deficient number, since it is larger than the sum of its proper divisors (12318801).

86231551 is a wasteful number, since it uses less digits than its factorization.

86231551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12318800.

The product of its digits is 7200, while the sum is 31.

The square root of 86231551 is about 9286.0944966116. The cubic root of 86231551 is about 441.7962913385.

The spelling of 86231551 in words is "eighty-six million, two hundred thirty-one thousand, five hundred fifty-one".