87215339 has 4 divisors (see below), whose sum is σ = 91805640. Its totient is φ = 82625040.

The previous prime is 87215329. The next prime is 87215341. The reversal of 87215339 is 93351278.

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-87215339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87215329) 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, 2295122 + ... + 2295159.

It is an arithmetic number, because the mean of its divisors is an integer number (22951410).

Almost surely, 2^87215339 is an apocalyptic number.

87215339 is a deficient number, since it is larger than the sum of its proper divisors (4590301).

87215339 is a wasteful number, since it uses less digits than its factorization.

87215339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4590300.

The product of its digits is 45360, while the sum is 38.

The square root of 87215339 is about 9338.9153010401. The cubic root of 87215339 is about 443.4700461529.

The spelling of 87215339 in words is "eighty-seven million, two hundred fifteen thousand, three hundred thirty-nine".