207281 has 8 divisors (see below), whose sum is σ = 223560. Its totient is φ = 191488.

The previous prime is 207269. The next prime is 207287. The reversal of 207281 is 182702.

207281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 34225 + 173056 = 185^2 + 416^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-207281 is a prime.

It is a super-2 number, since 2×207281² = 85930825922, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 207281.

It is not an unprimeable number, because it can be changed into a prime (207287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1445 + ... + 1581.

It is an arithmetic number, because the mean of its divisors is an integer number (27945).

2²⁰⁷²⁸¹ is an apocalyptic number.

It is an amenable number.

207281 is a deficient number, since it is larger than the sum of its proper divisors (16279).

207281 is a wasteful number, since it uses less digits than its factorization.

207281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 207281 is about 455.2812317678. The cubic root of 207281 is about 59.1815722106.

Adding to 207281 its reverse (182702), we get a palindrome (389983).

The spelling of 207281 in words is "two hundred seven thousand, two hundred eighty-one".