86521573 has 8 divisors (see below), whose sum is σ = 91171520. Its totient is φ = 81881280.

The previous prime is 86521559. The next prime is 86521583. The reversal of 86521573 is 37512568.

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

It is a cyclic number.

It is not a de Polignac number, because 86521573 - 2¹³ = 86513381 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 (86521583) 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 7 ways as a sum of consecutive naturals, for example, 22888 + ... + 26398.

It is an arithmetic number, because the mean of its divisors is an integer number (11396440).

Almost surely, 2^86521573 is an apocalyptic number.

It is an amenable number.

86521573 is a deficient number, since it is larger than the sum of its proper divisors (4649947).

86521573 is a wasteful number, since it uses less digits than its factorization.

86521573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4827.

The product of its digits is 50400, while the sum is 37.

The square root of 86521573 is about 9301.6973182318. The cubic root of 86521573 is about 442.2910339369.

The spelling of 86521573 in words is "eighty-six million, five hundred twenty-one thousand, five hundred seventy-three".