423404231 has 4 divisors (see below), whose sum is σ = 437062464. Its totient is φ = 409746000.

The previous prime is 423404173. The next prime is 423404257. The reversal of 423404231 is 132404324.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423404231 is a prime.

It is a super-2 number, since 2×423404231² = 358542285657402722, 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 = 423404197 and 423404206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423404281) 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, 6829070 + ... + 6829131.

It is an arithmetic number, because the mean of its divisors is an integer number (109265616).

Almost surely, 2^423404231 is an apocalyptic number.

423404231 is a deficient number, since it is larger than the sum of its proper divisors (13658233).

423404231 is a wasteful number, since it uses less digits than its factorization.

423404231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13658232.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 423404231 is about 20576.7886464336. The cubic root of 423404231 is about 750.9051182049.

Adding to 423404231 its reverse (132404324), we get a palindrome (555808555).

The spelling of 423404231 in words is "four hundred twenty-three million, four hundred four thousand, two hundred thirty-one".