276221 has 4 divisors (see below), whose sum is σ = 301344. Its totient is φ = 251100.

The previous prime is 276209. The next prime is 276229. The reversal of 276221 is 122672.

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 276221 - 2¹⁴ = 259837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 276193 and 276202.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 276221.

It is not an unprimeable number, because it can be changed into a prime (276229) 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, 12545 + ... + 12566.

It is an arithmetic number, because the mean of its divisors is an integer number (75336).

2²⁷⁶²²¹ is an apocalyptic number.

It is an amenable number.

276221 is a deficient number, since it is larger than the sum of its proper divisors (25123).

276221 is a wasteful number, since it uses less digits than its factorization.

276221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25122.

The product of its digits is 336, while the sum is 20.

The square root of 276221 is about 525.5673125300. The cubic root of 276221 is about 65.1256740192.

Adding to 276221 its reverse (122672), we get a palindrome (398893).

The spelling of 276221 in words is "two hundred seventy-six thousand, two hundred twenty-one".