223971 has 12 divisors (see below), whose sum is σ = 328776. Its totient is φ = 135520.

The previous prime is 223969. The next prime is 223999. The reversal of 223971 is 179322.

It is not a de Polignac number, because 223971 - 2¹ = 223969 is a prime.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (223921) 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, 55 + ... + 671.

It is an arithmetic number, because the mean of its divisors is an integer number (27398).

2²²³⁹⁷¹ is an apocalyptic number.

223971 is a deficient number, since it is larger than the sum of its proper divisors (104805).

223971 is a wasteful number, since it uses less digits than its factorization.

223971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642 (or 631 counting only the distinct ones).

The product of its digits is 756, while the sum is 24.

The square root of 223971 is about 473.2557448146. The cubic root of 223971 is about 60.7291584589.

It can be divided in two parts, 22 and 3971, that added together give a palindrome (3993).

The spelling of 223971 in words is "two hundred twenty-three thousand, nine hundred seventy-one".