423331431 has 16 divisors (see below), whose sum is σ = 587368320. Its totient is φ = 270980640.

The previous prime is 423331427. The next prime is 423331451. The reversal of 423331431 is 134133324.

It is not a de Polignac number, because 423331431 - 2² = 423331427 is a prime.

It is a super-2 number, since 2×423331431² = 358419000945015522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423331451) 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, 20200 + ... + 35421.

It is an arithmetic number, because the mean of its divisors is an integer number (36710520).

Almost surely, 2^423331431 is an apocalyptic number.

423331431 is a deficient number, since it is larger than the sum of its proper divisors (164036889).

423331431 is a wasteful number, since it uses less digits than its factorization.

423331431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55726.

The product of its digits is 2592, while the sum is 24.

The square root of 423331431 is about 20575.0195868680. The cubic root of 423331431 is about 750.8620789358.

Adding to 423331431 its reverse (134133324), we get a palindrome (557464755).

The spelling of 423331431 in words is "four hundred twenty-three million, three hundred thirty-one thousand, four hundred thirty-one".