223851 has 16 divisors (see below), whose sum is σ = 322560. Its totient is φ = 137760.

The previous prime is 223849. The next prime is 223903. The reversal of 223851 is 158322.

It is not a de Polignac number, because 223851 - 2¹ = 223849 is a prime.

It is a nialpdrome in base 12.

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 15 ways as a sum of consecutive naturals, for example, 2656 + ... + 2738.

It is an arithmetic number, because the mean of its divisors is an integer number (20160).

2²²³⁸⁵¹ is an apocalyptic number.

223851 is a deficient number, since it is larger than the sum of its proper divisors (98709).

223851 is a wasteful number, since it uses less digits than its factorization.

223851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146.

The product of its digits is 480, while the sum is 21.

The square root of 223851 is about 473.1289464829. The cubic root of 223851 is about 60.7183106246.

The spelling of 223851 in words is "two hundred twenty-three thousand, eight hundred fifty-one".