86530221 has 16 divisors (see below), whose sum is σ = 135734400. Its totient is φ = 54293184.

The previous prime is 86530217. The next prime is 86530247. The reversal of 86530221 is 12203568.

86530221 is a `hidden beast` number, since 8 + 653 + 0 + 2 + 2 + 1 = 666.

It is not a de Polignac number, because 86530221 - 2² = 86530217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86530261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93801 + ... + 94718.

It is an arithmetic number, because the mean of its divisors is an integer number (8483400).

Almost surely, 2^86530221 is an apocalyptic number.

It is an amenable number.

86530221 is a deficient number, since it is larger than the sum of its proper divisors (49204179).

86530221 is a wasteful number, since it uses less digits than its factorization.

86530221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188545 (or 188539 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 86530221 is about 9302.1621680123. The cubic root of 86530221 is about 442.3057693965.

Adding to 86530221 its reverse (12203568), we get a palindrome (98733789).

The spelling of 86530221 in words is "eighty-six million, five hundred thirty thousand, two hundred twenty-one".