87827231 has 4 divisors (see below), whose sum is σ = 88518912. Its totient is φ = 87135552.

The previous prime is 87827227. The next prime is 87827237. The reversal of 87827231 is 13272878.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87827231 - 2² = 87827227 is a prime.

It is a super-2 number, since 2×87827231² = 15427245010254722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87827237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345650 + ... + 345903.

It is an arithmetic number, because the mean of its divisors is an integer number (22129728).

Almost surely, 2^87827231 is an apocalyptic number.

87827231 is a deficient number, since it is larger than the sum of its proper divisors (691681).

87827231 is a wasteful number, since it uses less digits than its factorization.

87827231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691680.

The product of its digits is 37632, while the sum is 38.

The square root of 87827231 is about 9371.6183767800. The cubic root of 87827231 is about 444.5047404283.

The spelling of 87827231 in words is "eighty-seven million, eight hundred twenty-seven thousand, two hundred thirty-one".