202281 has 4 divisors (see below), whose sum is σ = 269712. Its totient is φ = 134852.

The previous prime is 202277. The next prime is 202289. The reversal of 202281 is 182202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 202281 - 2² = 202277 is a prime.

It is a super-2 number, since 2×202281² = 81835205922, which contains 22 as substring.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 202281.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 202281.

It is not an unprimeable number, because it can be changed into a prime (202289) 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, 33711 + ... + 33716.

It is an arithmetic number, because the mean of its divisors is an integer number (67428).

2²⁰²²⁸¹ is an apocalyptic number.

It is an amenable number.

202281 is a deficient number, since it is larger than the sum of its proper divisors (67431).

202281 is an equidigital number, since it uses as much as digits as its factorization.

202281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67430.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 202281 is about 449.7566008409. The cubic root of 202281 is about 58.7018376973.

Adding to 202281 its reverse (182202), we get a palindrome (384483).

The spelling of 202281 in words is "two hundred two thousand, two hundred eighty-one".