87332281 has 4 divisors (see below), whose sum is σ = 92469492. Its totient is φ = 82195072.

The previous prime is 87332263. The next prime is 87332317. The reversal of 87332281 is 18223378.

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

It can be written as a sum of positive squares in 2 ways, for example, as 47831056 + 39501225 = 6916^2 + 6285^2 .

It is a cyclic number.

It is not a de Polignac number, because 87332281 - 2⁷ = 87332153 is a prime.

It is a super-2 number, since 2×87332281² = 15253854609325922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87332261) 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, 2568580 + ... + 2568613.

It is an arithmetic number, because the mean of its divisors is an integer number (23117373).

Almost surely, 2^87332281 is an apocalyptic number.

It is an amenable number.

87332281 is a deficient number, since it is larger than the sum of its proper divisors (5137211).

87332281 is a wasteful number, since it uses less digits than its factorization.

87332281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5137210.

The product of its digits is 16128, while the sum is 34.

The square root of 87332281 is about 9345.1742091841. The cubic root of 87332281 is about 443.6681654026.

The spelling of 87332281 in words is "eighty-seven million, three hundred thirty-two thousand, two hundred eighty-one".