227661 has 16 divisors (see below), whose sum is σ = 357504. Its totient is φ = 126144.

The previous prime is 227653. The next prime is 227663. The reversal of 227661 is 166722.

It is a happy number.

It is not a de Polignac number, because 227661 - 2³ = 227653 is a prime.

227661 is a lucky 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 227661.

It is not an unprimeable number, because it can be changed into a prime (227663) 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 15 ways as a sum of consecutive naturals, for example, 631 + ... + 923.

It is an arithmetic number, because the mean of its divisors is an integer number (22344).

2²²⁷⁶⁶¹ is an apocalyptic number.

227661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

227661 is a deficient number, since it is larger than the sum of its proper divisors (129843).

227661 is a wasteful number, since it uses less digits than its factorization.

227661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340.

The product of its digits is 1008, while the sum is 24.

The square root of 227661 is about 477.1383447178. The cubic root of 227661 is about 61.0608547944.

It can be divided in two parts, 227 and 661, that added together give a palindrome (888).

The spelling of 227661 in words is "two hundred twenty-seven thousand, six hundred sixty-one".