431221253423 has 4 divisors (see below), whose sum is σ = 431285306088. Its totient is φ = 431157200760.

The previous prime is 431221253401. The next prime is 431221253443. The reversal of 431221253423 is 324352122134.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 431221253423 - 2³⁸ = 156343346479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 431221253423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431221253443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32016233 + ... + 32029698.

It is an arithmetic number, because the mean of its divisors is an integer number (107821326522).

Almost surely, 2^431221253423 is an apocalyptic number.

431221253423 is a deficient number, since it is larger than the sum of its proper divisors (64052665).

431221253423 is an equidigital number, since it uses as much as digits as its factorization.

431221253423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64052664.

The product of its digits is 34560, while the sum is 32.

Adding to 431221253423 its reverse (324352122134), we get a palindrome (755573375557).

The spelling of 431221253423 in words is "four hundred thirty-one billion, two hundred twenty-one million, two hundred fifty-three thousand, four hundred twenty-three".