87215422 has 16 divisors (see below), whose sum is σ = 152334432. Its totient is φ = 36672480.

The previous prime is 87215407. The next prime is 87215459. The reversal of 87215422 is 22451278.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58029 + ... + 59512.

It is an arithmetic number, because the mean of its divisors is an integer number (9520902).

Almost surely, 2^87215422 is an apocalyptic number.

87215422 is a deficient number, since it is larger than the sum of its proper divisors (65119010).

87215422 is a wasteful number, since it uses less digits than its factorization.

87215422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117603.

The product of its digits is 8960, while the sum is 31.

The square root of 87215422 is about 9338.9197448099. The cubic root of 87215422 is about 443.4701868315.

The spelling of 87215422 in words is "eighty-seven million, two hundred fifteen thousand, four hundred twenty-two".