423403431 has 16 divisors (see below), whose sum is σ = 624299520. Its totient is φ = 253091520.

The previous prime is 423403403. The next prime is 423403447. The reversal of 423403431 is 134304324.

It is not a de Polignac number, because 423403431 - 2⁷ = 423403303 is a prime.

It is a super-3 number, since 3×423403431³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423403031) 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, 85471 + ... + 90288.

It is an arithmetic number, because the mean of its divisors is an integer number (39018720).

Almost surely, 2^423403431 is an apocalyptic number.

423403431 is a deficient number, since it is larger than the sum of its proper divisors (200896089).

423403431 is a wasteful number, since it uses less digits than its factorization.

423403431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175846.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 423403431 is about 20576.7692070451. The cubic root of 423403431 is about 750.9046452727.

Adding to 423403431 its reverse (134304324), we get a palindrome (557707755).

The spelling of 423403431 in words is "four hundred twenty-three million, four hundred three thousand, four hundred thirty-one".