227981 has 12 divisors (see below), whose sum is σ = 263520. Its totient is φ = 196560.

The previous prime is 227977. The next prime is 227989. The reversal of 227981 is 189722.

It is a happy number.

It is not a de Polignac number, because 227981 - 2² = 227977 is a prime.

It is a super-2 number, since 2×227981² = 103950672722, which contains 22 as substring.

It is a Duffinian number.

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 227981.

It is not an unprimeable number, because it can be changed into a prime (227989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3176 + ... + 3246.

It is an arithmetic number, because the mean of its divisors is an integer number (21960).

2²²⁷⁹⁸¹ is an apocalyptic number.

It is an amenable number.

227981 is a deficient number, since it is larger than the sum of its proper divisors (35539).

227981 is a wasteful number, since it uses less digits than its factorization.

227981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 103 counting only the distinct ones).

The product of its digits is 2016, while the sum is 29.

The square root of 227981 is about 477.4735594774. The cubic root of 227981 is about 61.0894504194.

The spelling of 227981 in words is "two hundred twenty-seven thousand, nine hundred eighty-one".