223530431 has 4 divisors (see below), whose sum is σ = 229571832. Its totient is φ = 217489032.

The previous prime is 223530403. The next prime is 223530443. The reversal of 223530431 is 134035322.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134035322 = 2 ⋅67017661.

It is a cyclic number.

It is not a de Polignac number, because 223530431 - 2²² = 219336127 is a prime.

It is a super-3 number, since 3×223530431³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223530397 and 223530406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223530481) 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, 3020645 + ... + 3020718.

It is an arithmetic number, because the mean of its divisors is an integer number (57392958).

Almost surely, 2^223530431 is an apocalyptic number.

223530431 is a deficient number, since it is larger than the sum of its proper divisors (6041401).

223530431 is an equidigital number, since it uses as much as digits as its factorization.

223530431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6041400.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 223530431 is about 14950.9341179740. The cubic root of 223530431 is about 606.8931260515.

Adding to 223530431 its reverse (134035322), we get a palindrome (357565753).

The spelling of 223530431 in words is "two hundred twenty-three million, five hundred thirty thousand, four hundred thirty-one".