223131 has 4 divisors (see below), whose sum is σ = 297512. Its totient is φ = 148752.

The previous prime is 223129. The next prime is 223133. The reversal of 223131 is 131322.

It is a happy number.

223131 is nontrivially palindromic in base 2.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (223129) and next prime (223133).

It is not a de Polignac number, because 223131 - 2¹ = 223129 is a prime.

It is a super-3 number, since 3×223131³ = 33327365939871273, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (223133) 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, 37186 + ... + 37191.

It is an arithmetic number, because the mean of its divisors is an integer number (74378).

2²²³¹³¹ is an apocalyptic number.

223131 is a deficient number, since it is larger than the sum of its proper divisors (74381).

223131 is an equidigital number, since it uses as much as digits as its factorization.

223131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74380.

The product of its digits is 36, while the sum is 12.

The square root of 223131 is about 472.3674417231. The cubic root of 223131 is about 60.6531420696.

Adding to 223131 its reverse (131322), we get a palindrome (354453).

Subtracting from 223131 its reverse (131322), we obtain a square (91809 = 303²).

The spelling of 223131 in words is "two hundred twenty-three thousand, one hundred thirty-one".