431415421 has 2 divisors, whose sum is σ = 431415422. Its totient is φ = 431415420.

The previous prime is 431415419. The next prime is 431415451. The reversal of 431415421 is 124514134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223652025 + 207763396 = 14955^2 + 14414^2 .

It is a cyclic number.

It is not a de Polignac number, because 431415421 - 2¹ = 431415419 is a prime.

It is a super-2 number, since 2×431415421² = 372238530953214482, which contains 22 as substring.

Together with 431415419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431415401) 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 as a sum of consecutive naturals, namely, 215707710 + 215707711.

It is an arithmetic number, because the mean of its divisors is an integer number (215707711).

Almost surely, 2^431415421 is an apocalyptic number.

It is an amenable number.

431415421 is a deficient number, since it is larger than the sum of its proper divisors (1).

431415421 is an equidigital number, since it uses as much as digits as its factorization.

431415421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 25.

The square root of 431415421 is about 20770.5421450669. The cubic root of 431415421 is about 755.6114929663.

Adding to 431415421 its reverse (124514134), we get a palindrome (555929555).

The spelling of 431415421 in words is "four hundred thirty-one million, four hundred fifteen thousand, four hundred twenty-one".