87221159 has 4 divisors (see below), whose sum is σ = 87664104. Its totient is φ = 86778216.

The previous prime is 87221117. The next prime is 87221177. The reversal of 87221159 is 95112278.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87221159 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 (87221179) 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, 221177 + ... + 221570.

It is an arithmetic number, because the mean of its divisors is an integer number (21916026).

Almost surely, 2^87221159 is an apocalyptic number.

87221159 is a deficient number, since it is larger than the sum of its proper divisors (442945).

87221159 is a wasteful number, since it uses less digits than its factorization.

87221159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442944.

The product of its digits is 10080, while the sum is 35.

The square root of 87221159 is about 9339.2268951986. The cubic root of 87221159 is about 443.4799103897.

The spelling of 87221159 in words is "eighty-seven million, two hundred twenty-one thousand, one hundred fifty-nine".