431313023421 has 20 divisors (see below), whose sum is σ = 736350982752. Its totient is φ = 246464584488.

The previous prime is 431313023419. The next prime is 431313023431. The reversal of 431313023421 is 124320313134.

It is a happy number.

431313023421 is a `hidden beast` number, since 4 + 3 + 1 + 313 + 0 + 2 + 342 + 1 = 666.

It is not a de Polignac number, because 431313023421 - 2¹ = 431313023419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431313023431) 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 19 ways as a sum of consecutive naturals, for example, 380346015 + ... + 380347148.

Almost surely, 2^431313023421 is an apocalyptic number.

It is an amenable number.

431313023421 is a deficient number, since it is larger than the sum of its proper divisors (305037959331).

431313023421 is an equidigital number, since it uses as much as digits as its factorization.

431313023421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760693182 (or 760693173 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 431313023421 its reverse (124320313134), we get a palindrome (555633336555).

The spelling of 431313023421 in words is "four hundred thirty-one billion, three hundred thirteen million, twenty-three thousand, four hundred twenty-one".