87213567 has 32 divisors (see below), whose sum is σ = 136691712. Its totient is φ = 48432384.

The previous prime is 87213563. The next prime is 87213569. The reversal of 87213567 is 76531278.

It is not a de Polignac number, because 87213567 - 2² = 87213563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87213563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141043 + ... + 141659.

It is an arithmetic number, because the mean of its divisors is an integer number (4271616).

Almost surely, 2^87213567 is an apocalyptic number.

87213567 is a deficient number, since it is larger than the sum of its proper divisors (49478145).

87213567 is a wasteful number, since it uses less digits than its factorization.

87213567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807.

The product of its digits is 70560, while the sum is 39.

The square root of 87213567 is about 9338.8204287265. The cubic root of 87213567 is about 443.4670427277.

The spelling of 87213567 in words is "eighty-seven million, two hundred thirteen thousand, five hundred sixty-seven".