227021 has 4 divisors (see below), whose sum is σ = 228000. Its totient is φ = 226044.

The previous prime is 227011. The next prime is 227027. The reversal of 227021 is 120722.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-227021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 226987 and 227005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (227027) 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, 80 + ... + 678.

It is an arithmetic number, because the mean of its divisors is an integer number (57000).

2²²⁷⁰²¹ is an apocalyptic number.

It is an amenable number.

227021 is a deficient number, since it is larger than the sum of its proper divisors (979).

227021 is an equidigital number, since it uses as much as digits as its factorization.

227021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 227021 is about 476.4672076859. The cubic root of 227021 is about 61.0035830557.

Adding to 227021 its reverse (120722), we get a palindrome (347743).

The spelling of 227021 in words is "two hundred twenty-seven thousand, twenty-one", and thus it is an iban number.