87231 has 4 divisors (see below), whose sum is σ = 116312. Its totient is φ = 58152.

The previous prime is 87223. The next prime is 87251. The reversal of 87231 is 13278.

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

It is not a de Polignac number, because 87231 - 2³ = 87223 is a prime.

It is a super-2 number, since 2×87231² = 15218494722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87198 and 87207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87211) 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 3 ways as a sum of consecutive naturals, for example, 14536 + ... + 14541.

It is an arithmetic number, because the mean of its divisors is an integer number (29078).

2⁸⁷²³¹ is an apocalyptic number.

87231 is a deficient number, since it is larger than the sum of its proper divisors (29081).

87231 is a wasteful number, since it uses less digits than its factorization.

87231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29080.

The product of its digits is 336, while the sum is 21.

The square root of 87231 is about 295.3489461637. The cubic root of 87231 is about 44.3496588765.

It can be divided in two parts, 872 and 31, that added together give a triangular number (903 = T₄₂).

The spelling of 87231 in words is "eighty-seven thousand, two hundred thirty-one".