87228213 has 8 divisors (see below), whose sum is σ = 121361088. Its totient is φ = 55623744.

The previous prime is 87228191. The next prime is 87228227. The reversal of 87228213 is 31282278.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87228213 - 2⁶ = 87228149 is a prime.

It is a super-2 number, since 2×87228213² = 15217522286346738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87228233) 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 7 ways as a sum of consecutive naturals, for example, 632020 + ... + 632157.

It is an arithmetic number, because the mean of its divisors is an integer number (15170136).

Almost surely, 2^87228213 is an apocalyptic number.

It is an amenable number.

87228213 is a deficient number, since it is larger than the sum of its proper divisors (34132875).

87228213 is a wasteful number, since it uses less digits than its factorization.

87228213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264203.

The product of its digits is 10752, while the sum is 33.

The square root of 87228213 is about 9339.6045419493. The cubic root of 87228213 is about 443.4918655276.

The spelling of 87228213 in words is "eighty-seven million, two hundred twenty-eight thousand, two hundred thirteen".