227921 has 4 divisors (see below), whose sum is σ = 230052. Its totient is φ = 225792.

The previous prime is 227893. The next prime is 227947. The reversal of 227921 is 129722.

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 83521 + 144400 = 289^2 + 380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-227921 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 227921.

It is not an unprimeable number, because it can be changed into a prime (227951) 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, 896 + ... + 1121.

It is an arithmetic number, because the mean of its divisors is an integer number (57513).

2²²⁷⁹²¹ is an apocalyptic number.

It is an amenable number.

227921 is a deficient number, since it is larger than the sum of its proper divisors (2131).

227921 is a wasteful number, since it uses less digits than its factorization.

227921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2130.

The product of its digits is 504, while the sum is 23.

The square root of 227921 is about 477.4107246386. The cubic root of 227921 is about 61.0840907789.

The spelling of 227921 in words is "two hundred twenty-seven thousand, nine hundred twenty-one".