87215442 has 16 divisors (see below), whose sum is σ = 174523872. Its totient is φ = 29056320.

The previous prime is 87215407. The next prime is 87215459. The reversal of 87215442 is 24451278.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16842 + ... + 21402.

It is an arithmetic number, because the mean of its divisors is an integer number (10907742).

Almost surely, 2^87215442 is an apocalyptic number.

87215442 is an abundant number, since it is smaller than the sum of its proper divisors (87308430).

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

87215442 is a wasteful number, since it uses less digits than its factorization.

87215442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7753.

The product of its digits is 17920, while the sum is 33.

The square root of 87215442 is about 9338.9208155975. The cubic root of 87215442 is about 443.4702207300.

The spelling of 87215442 in words is "eighty-seven million, two hundred fifteen thousand, four hundred forty-two".