86221000 has 64 divisors (see below), whose sum is σ = 203448960. Its totient is φ = 34200000.

The previous prime is 86220971. The next prime is 86221001. The reversal of 86221000 is 12268.

It is a happy number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86221001) 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, 150715 + ... + 151285.

It is an arithmetic number, because the mean of its divisors is an integer number (3178890).

Almost surely, 2^86221000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86221000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101724480).

86221000 is an abundant number, since it is smaller than the sum of its proper divisors (117227960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86221000 is a wasteful number, since it uses less digits than its factorization.

86221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743 (or 729 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 86221000 is about 9285.5263717250. The cubic root of 86221000 is about 441.7782717051.

Adding to 86221000 its reverse (12268), we get a palindrome (86233268).

The spelling of 86221000 in words is "eighty-six million, two hundred twenty-one thousand".