431423421 has 32 divisors (see below), whose sum is σ = 679819392. Its totient is φ = 239919360.

The previous prime is 431423413. The next prime is 431423423. The reversal of 431423421 is 124324134.

It is not a de Polignac number, because 431423421 - 2³ = 431423413 is a prime.

It is a super-2 number, since 2×431423421² = 372252336374686482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 431423391 and 431423400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431423423) 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, 71311 + ... + 77123.

It is an arithmetic number, because the mean of its divisors is an integer number (21244356).

Almost surely, 2^431423421 is an apocalyptic number.

It is an amenable number.

431423421 is a deficient number, since it is larger than the sum of its proper divisors (248395971).

431423421 is a wasteful number, since it uses less digits than its factorization.

431423421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6013.

The product of its digits is 2304, while the sum is 24.

The square root of 431423421 is about 20770.7347246071. The cubic root of 431423421 is about 755.6161635261.

Adding to 431423421 its reverse (124324134), we get a palindrome (555747555).

The spelling of 431423421 in words is "four hundred thirty-one million, four hundred twenty-three thousand, four hundred twenty-one".