87218223 has 4 divisors (see below), whose sum is σ = 116290968. Its totient is φ = 58145480.

The previous prime is 87218207. The next prime is 87218249. The reversal of 87218223 is 32281278.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87218223 - 2⁴ = 87218207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87218273) 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, 14536368 + ... + 14536373.

It is an arithmetic number, because the mean of its divisors is an integer number (29072742).

Almost surely, 2^87218223 is an apocalyptic number.

87218223 is a deficient number, since it is larger than the sum of its proper divisors (29072745).

87218223 is a wasteful number, since it uses less digits than its factorization.

87218223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29072744.

The product of its digits is 10752, while the sum is 33.

The square root of 87218223 is about 9339.0697074173. The cubic root of 87218223 is about 443.4749342591.

The spelling of 87218223 in words is "eighty-seven million, two hundred eighteen thousand, two hundred twenty-three".