431211421 has 8 divisors (see below), whose sum is σ = 433448064. Its totient is φ = 428981280.

The previous prime is 431211413. The next prime is 431211427. The reversal of 431211421 is 124112134.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 431211421 - 2³ = 431211413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431211427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179001 + ... + 181393.

It is an arithmetic number, because the mean of its divisors is an integer number (54181008).

Almost surely, 2^431211421 is an apocalyptic number.

It is an amenable number.

431211421 is a deficient number, since it is larger than the sum of its proper divisors (2236643).

431211421 is a wasteful number, since it uses less digits than its factorization.

431211421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3251.

The product of its digits is 192, while the sum is 19.

The square root of 431211421 is about 20765.6307633551. The cubic root of 431211421 is about 755.4923741774.

Adding to 431211421 its reverse (124112134), we get a palindrome (555323555).

The spelling of 431211421 in words is "four hundred thirty-one million, two hundred eleven thousand, four hundred twenty-one".