87213224 has 32 divisors (see below), whose sum is σ = 187320000. Its totient is φ = 37290240.

The previous prime is 87213223. The next prime is 87213229. The reversal of 87213224 is 42231278.

It is a super-2 number, since 2×87213224² = 15212292880948352, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87213223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26384 + ... + 29504.

It is an arithmetic number, because the mean of its divisors is an integer number (5853750).

Almost surely, 2^87213224 is an apocalyptic number.

It is an amenable number.

87213224 is an abundant number, since it is smaller than the sum of its proper divisors (100106776).

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

87213224 is a wasteful number, since it uses less digits than its factorization.

87213224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3633 (or 3629 counting only the distinct ones).

The product of its digits is 5376, while the sum is 29.

The square root of 87213224 is about 9338.8020645048. The cubic root of 87213224 is about 443.4664613602.

The spelling of 87213224 in words is "eighty-seven million, two hundred thirteen thousand, two hundred twenty-four".