423400231 has 4 divisors (see below), whose sum is σ = 433246792. Its totient is φ = 413553672.

The previous prime is 423400223. The next prime is 423400259. The reversal of 423400231 is 132004324.

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

It is a cyclic number.

It is not a de Polignac number, because 423400231 - 2³ = 423400223 is a prime.

It is a super-2 number, since 2×423400231² = 358535511221706722, 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 = 423400199 and 423400208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423400291) 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, 4923216 + ... + 4923301.

It is an arithmetic number, because the mean of its divisors is an integer number (108311698).

Almost surely, 2^423400231 is an apocalyptic number.

423400231 is a deficient number, since it is larger than the sum of its proper divisors (9846561).

423400231 is an equidigital number, since it uses as much as digits as its factorization.

423400231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9846560.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 423400231 is about 20576.6914493074. The cubic root of 423400231 is about 750.9027535380.

Adding to 423400231 its reverse (132004324), we get a palindrome (555404555).

The spelling of 423400231 in words is "four hundred twenty-three million, four hundred thousand, two hundred thirty-one".