87331 has 4 divisors (see below), whose sum is σ = 91152. Its totient is φ = 83512.

The previous prime is 87323. The next prime is 87337. The reversal of 87331 is 13378.

87331 = 19² + 20² + ... + 64².

87331 is nontrivially palindromic in base 6.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13378 = 2 ⋅6689.

It is a cyclic number.

It is not a de Polignac number, because 87331 - 2³ = 87323 is a prime.

It is a super-2 number, since 2×87331² = 15253407122, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (87337) 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, 1876 + ... + 1921.

It is an arithmetic number, because the mean of its divisors is an integer number (22788).

2⁸⁷³³¹ is an apocalyptic number.

87331 is a deficient number, since it is larger than the sum of its proper divisors (3821).

87331 is a wasteful number, since it uses less digits than its factorization.

87331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3820.

The product of its digits is 504, while the sum is 22.

The square root of 87331 is about 295.5181889495. The cubic root of 87331 is about 44.3665996133.

The spelling of 87331 in words is "eighty-seven thousand, three hundred thirty-one".