223839431 has 4 divisors (see below), whose sum is σ = 226147152. Its totient is φ = 221531712.

The previous prime is 223839373. The next prime is 223839433. The reversal of 223839431 is 134938322.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134938322 = 2 ⋅67469161.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223839431 is a prime.

It is a super-2 number, since 2×223839431² = 100208181740807522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223839391 and 223839400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223839433) 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, 1153715 + ... + 1153908.

It is an arithmetic number, because the mean of its divisors is an integer number (56536788).

Almost surely, 2^223839431 is an apocalyptic number.

223839431 is a deficient number, since it is larger than the sum of its proper divisors (2307721).

223839431 is an equidigital number, since it uses as much as digits as its factorization.

223839431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2307720.

The product of its digits is 31104, while the sum is 35.

The square root of 223839431 is about 14961.2643516516. The cubic root of 223839431 is about 607.1726459808.

The spelling of 223839431 in words is "two hundred twenty-three million, eight hundred thirty-nine thousand, four hundred thirty-one".