86231805 has 32 divisors (see below), whose sum is σ = 150958080. Its totient is φ = 41686080.

The previous prime is 86231791. The next prime is 86231851. The reversal of 86231805 is 50813268.

It is a happy number.

It is not a de Polignac number, because 86231805 - 2¹⁴ = 86215421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82476 + ... + 83514.

It is an arithmetic number, because the mean of its divisors is an integer number (4717440).

Almost surely, 2^86231805 is an apocalyptic number.

It is an amenable number.

86231805 is a deficient number, since it is larger than the sum of its proper divisors (64726275).

86231805 is a wasteful number, since it uses less digits than its factorization.

86231805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 86231805 is about 9286.1081729646. The cubic root of 86231805 is about 441.7967251168.

The spelling of 86231805 in words is "eighty-six million, two hundred thirty-one thousand, eight hundred five".