227861 has 4 divisors (see below), whose sum is σ = 237792. Its totient is φ = 217932.

The previous prime is 227849. The next prime is 227869. The reversal of 227861 is 168722.

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 227861 - 2⁶ = 227797 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 227861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (227869) 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, 4931 + ... + 4976.

It is an arithmetic number, because the mean of its divisors is an integer number (59448).

2²²⁷⁸⁶¹ is an apocalyptic number.

It is an amenable number.

227861 is a deficient number, since it is larger than the sum of its proper divisors (9931).

227861 is an equidigital number, since it uses as much as digits as its factorization.

227861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9930.

The product of its digits is 1344, while the sum is 26.

The square root of 227861 is about 477.3478815288. The cubic root of 227861 is about 61.0787301977.

The spelling of 227861 in words is "two hundred twenty-seven thousand, eight hundred sixty-one".