223431643 has 8 divisors (see below), whose sum is σ = 229566960. Its totient is φ = 217374720.

The previous prime is 223431619. The next prime is 223431701. The reversal of 223431643 is 346134322.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223431643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223431343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13798 + ... + 25243.

It is an arithmetic number, because the mean of its divisors is an integer number (28695870).

Almost surely, 2^223431643 is an apocalyptic number.

223431643 is a deficient number, since it is larger than the sum of its proper divisors (6135317).

223431643 is an equidigital number, since it uses as much as digits as its factorization.

223431643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39197.

The product of its digits is 10368, while the sum is 28.

The square root of 223431643 is about 14947.6300128147. The cubic root of 223431643 is about 606.8037085583.

Adding to 223431643 its reverse (346134322), we get a palindrome (569565965).

The spelling of 223431643 in words is "two hundred twenty-three million, four hundred thirty-one thousand, six hundred forty-three".