423543530 has 16 divisors (see below), whose sum is σ = 780973704. Its totient is φ = 165285120.

The previous prime is 423543517. The next prime is 423543539. The reversal of 423543530 is 35345324.

It can be written as a sum of positive squares in 4 ways, for example, as 112126921 + 311416609 = 10589^2 + 17647^2 .

It is a junction number, because it is equal to n+sod(n) for n = 423543493 and 423543502.

It is not an unprimeable number, because it can be changed into a prime (423543539) 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, 516107 + ... + 516926.

Almost surely, 2^423543530 is an apocalyptic number.

423543530 is a deficient number, since it is larger than the sum of its proper divisors (357430174).

423543530 is a wasteful number, since it uses less digits than its factorization.

423543530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033081.

The product of its (nonzero) digits is 21600, while the sum is 29.

The square root of 423543530 is about 20580.1732257044. The cubic root of 423543530 is about 750.9874578506.

Adding to 423543530 its reverse (35345324), we get a palindrome (458888854).

The spelling of 423543530 in words is "four hundred twenty-three million, five hundred forty-three thousand, five hundred thirty".