86521801 has 12 divisors (see below), whose sum is σ = 92240400. Its totient is φ = 80928720.

The previous prime is 86521793. The next prime is 86521829. The reversal of 86521801 is 10812568.

It is not a de Polignac number, because 86521801 - 2³ = 86521793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86521861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 477931 + ... + 478111.

It is an arithmetic number, because the mean of its divisors is an integer number (7686700).

Almost surely, 2^86521801 is an apocalyptic number.

It is an amenable number.

86521801 is a deficient number, since it is larger than the sum of its proper divisors (5718599).

86521801 is a wasteful number, since it uses less digits than its factorization.

86521801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 86521801 is about 9301.7095740514. The cubic root of 86521801 is about 442.2914224422.

The spelling of 86521801 in words is "eighty-six million, five hundred twenty-one thousand, eight hundred one".