87222 has 8 divisors (see below), whose sum is σ = 174456. Its totient is φ = 29072.

The previous prime is 87221. The next prime is 87223. The reversal of 87222 is 22278.

It is an interprime number because it is at equal distance from previous prime (87221) and next prime (87223).

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

87222 is an admirable number.

It is an Ulam 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 (87221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7263 + ... + 7274.

It is an arithmetic number, because the mean of its divisors is an integer number (21807).

2⁸⁷²²² is an apocalyptic number.

87222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87228).

87222 is a wasteful number, since it uses less digits than its factorization.

87222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14542.

The product of its digits is 448, while the sum is 21.

The square root of 87222 is about 295.3337095558. Note that the first 3 decimals coincide. The cubic root of 87222 is about 44.3481335753.

The spelling of 87222 in words is "eighty-seven thousand, two hundred twenty-two".