87233281 has 4 divisors (see below), whose sum is σ = 89360964. Its totient is φ = 85105600.

The previous prime is 87233257. The next prime is 87233297. The reversal of 87233281 is 18233278.

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 6969600 + 80263681 = 2640^2 + 8959^2 .

It is a cyclic number.

It is not a de Polignac number, because 87233281 - 2¹⁷ = 87102209 is a prime.

It is a super-2 number, since 2×87233281² = 15219290628049922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87233221) 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, 1063780 + ... + 1063861.

It is an arithmetic number, because the mean of its divisors is an integer number (22340241).

Almost surely, 2^87233281 is an apocalyptic number.

It is an amenable number.

87233281 is a deficient number, since it is larger than the sum of its proper divisors (2127683).

87233281 is a wasteful number, since it uses less digits than its factorization.

87233281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127682.

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

The square root of 87233281 is about 9339.8758557060. The cubic root of 87233281 is about 443.5004543896.

The spelling of 87233281 in words is "eighty-seven million, two hundred thirty-three thousand, two hundred eighty-one".