423131421 has 16 divisors (see below), whose sum is σ = 575078400. Its totient is φ = 276658608.

The previous prime is 423131417. The next prime is 423131461. The reversal of 423131421 is 124131324.

It is not a de Polignac number, because 423131421 - 2² = 423131417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423131461) 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, 80100 + ... + 85218.

It is an arithmetic number, because the mean of its divisors is an integer number (35942400).

Almost surely, 2^423131421 is an apocalyptic number.

It is an amenable number.

423131421 is a deficient number, since it is larger than the sum of its proper divisors (151946979).

423131421 is a wasteful number, since it uses less digits than its factorization.

423131421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5648.

The product of its digits is 576, while the sum is 21.

The square root of 423131421 is about 20570.1585069245. The cubic root of 423131421 is about 750.7438078671.

Adding to 423131421 its reverse (124131324), we get a palindrome (547262745).

It can be divided in two parts, 42313 and 1421, that added together give a palindrome (43734).

The spelling of 423131421 in words is "four hundred twenty-three million, one hundred thirty-one thousand, four hundred twenty-one".