423234531 has 32 divisors (see below), whose sum is σ = 640107840. Its totient is φ = 276307200.

The previous prime is 423234491. The next prime is 423234563. The reversal of 423234531 is 135432324.

423234531 is a `hidden beast` number, since 423 + 234 + 5 + 3 + 1 = 666.

It is not a de Polignac number, because 423234531 - 2²⁶ = 356125667 is a prime.

It is a super-2 number, since 2×423234531² = 358254936461579922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 423234495 and 423234504.

It is not an unprimeable number, because it can be changed into a prime (423234731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 515101 + ... + 515921.

It is an arithmetic number, because the mean of its divisors is an integer number (20003370).

Almost surely, 2^423234531 is an apocalyptic number.

423234531 is a deficient number, since it is larger than the sum of its proper divisors (216873309).

423234531 is a wasteful number, since it uses less digits than its factorization.

423234531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204 (or 1198 counting only the distinct ones).

The product of its digits is 8640, while the sum is 27.

The square root of 423234531 is about 20572.6646548278. The cubic root of 423234531 is about 750.8047841211.

Adding to 423234531 its reverse (135432324), we get a palindrome (558666855).

The spelling of 423234531 in words is "four hundred twenty-three million, two hundred thirty-four thousand, five hundred thirty-one".