423431431 has 4 divisors (see below), whose sum is σ = 426663864. Its totient is φ = 420199000.

The previous prime is 423431381. The next prime is 423431447. The reversal of 423431431 is 134134324.

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 423431431 - 2¹³ = 423423239 is a prime.

It is a super-2 number, since 2×423431431² = 358588353517415522, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 423431396 and 423431405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423431471) 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, 1616020 + ... + 1616281.

It is an arithmetic number, because the mean of its divisors is an integer number (106665966).

Almost surely, 2^423431431 is an apocalyptic number.

423431431 is a deficient number, since it is larger than the sum of its proper divisors (3232433).

423431431 is a wasteful number, since it uses less digits than its factorization.

423431431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232432.

The product of its digits is 3456, while the sum is 25.

The square root of 423431431 is about 20577.4495747165. The cubic root of 423431431 is about 750.9211975450.

Adding to 423431431 its reverse (134134324), we get a palindrome (557565755).

The spelling of 423431431 in words is "four hundred twenty-three million, four hundred thirty-one thousand, four hundred thirty-one".