223431 has 16 divisors (see below), whose sum is σ = 340704. Its totient is φ = 129024.

The previous prime is 223429. The next prime is 223439. The reversal of 223431 is 134322.

It is not a de Polignac number, because 223431 - 2¹ = 223429 is a prime.

It is a super-2 number, since 2×223431² = 99842823522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 223431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 495 + ... + 831.

It is an arithmetic number, because the mean of its divisors is an integer number (21294).

2²²³⁴³¹ is an apocalyptic number.

223431 is a deficient number, since it is larger than the sum of its proper divisors (117273).

223431 is a wasteful number, since it uses less digits than its factorization.

223431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370.

The product of its digits is 144, while the sum is 15.

The square root of 223431 is about 472.6848844632. The cubic root of 223431 is about 60.6803126464.

Adding to 223431 its sum of digits (15), we get a triangular number (223446 = T₆₆₈).

Adding to 223431 its reverse (134322), we get a palindrome (357753).

The spelling of 223431 in words is "two hundred twenty-three thousand, four hundred thirty-one".