423542231 has 16 divisors (see below), whose sum is σ = 494918400. Its totient is φ = 362307960.

The previous prime is 423542209. The next prime is 423542237. The reversal of 423542231 is 132245324.

It is not a de Polignac number, because 423542231 - 2¹⁰ = 423541207 is a prime.

It is a super-2 number, since 2×423542231² = 358776042880914722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 423542231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423542237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236120 + ... + 237906.

It is an arithmetic number, because the mean of its divisors is an integer number (30932400).

Almost surely, 2^423542231 is an apocalyptic number.

423542231 is a deficient number, since it is larger than the sum of its proper divisors (71376169).

423542231 is an equidigital number, since it uses as much as digits as its factorization.

423542231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2499 (or 2485 counting only the distinct ones).

The product of its digits is 5760, while the sum is 26.

The square root of 423542231 is about 20580.1416661791. The cubic root of 423542231 is about 750.9866900950.

Adding to 423542231 its reverse (132245324), we get a palindrome (555787555).

The spelling of 423542231 in words is "four hundred twenty-three million, five hundred forty-two thousand, two hundred thirty-one".