223861 has 8 divisors (see below), whose sum is σ = 249984. Its totient is φ = 198720.

The previous prime is 223849. The next prime is 223903. The reversal of 223861 is 168322.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 223861 - 2⁵ = 223829 is a prime.

It is a super-2 number, since 2×223861² = 100227494642, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223831) 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 7 ways as a sum of consecutive naturals, for example, 301 + ... + 733.

It is an arithmetic number, because the mean of its divisors is an integer number (31248).

2²²³⁸⁶¹ is an apocalyptic number.

It is an amenable number.

223861 is a deficient number, since it is larger than the sum of its proper divisors (26123).

223861 is a wasteful number, since it uses less digits than its factorization.

223861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491.

The product of its digits is 576, while the sum is 22.

The square root of 223861 is about 473.1395143084. The cubic root of 223861 is about 60.7192147588.

It can be divided in two parts, 22 and 3861, that added together give a palindrome (3883).

The spelling of 223861 in words is "two hundred twenty-three thousand, eight hundred sixty-one".