431446041021 has 4 divisors (see below), whose sum is σ = 575261388032. Its totient is φ = 287630694012.

The previous prime is 431446040959. The next prime is 431446041031. The reversal of 431446041021 is 120140644134.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-431446041021 is a prime.

It is a super-2 number, since 2×431446041021² (a number of 24 digits) contains 22 as substring.

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 431446041021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431446041031) 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 3 ways as a sum of consecutive naturals, for example, 71907673501 + ... + 71907673506.

It is an arithmetic number, because the mean of its divisors is an integer number (143815347008).

Almost surely, 2^431446041021 is an apocalyptic number.

It is an amenable number.

431446041021 is a deficient number, since it is larger than the sum of its proper divisors (143815347011).

431446041021 is a wasteful number, since it uses less digits than its factorization.

431446041021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143815347010.

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 431446041021 its reverse (120140644134), we get a palindrome (551586685155).

The spelling of 431446041021 in words is "four hundred thirty-one billion, four hundred forty-six million, forty-one thousand, twenty-one".