431164044021 has 4 divisors (see below), whose sum is σ = 574885392032. Its totient is φ = 287442696012.

The previous prime is 431164044001. The next prime is 431164044089. The reversal of 431164044021 is 120440461134.

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 not a de Polignac number, because 431164044021 - 2¹⁸ = 431163781877 is a prime.

It is a super-3 number, since 3×431164044021³ (a number of 36 digits) contains 333 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 431164044021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431164044001) 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, 71860674001 + ... + 71860674006.

It is an arithmetic number, because the mean of its divisors is an integer number (143721348008).

Almost surely, 2^431164044021 is an apocalyptic number.

It is an amenable number.

431164044021 is a deficient number, since it is larger than the sum of its proper divisors (143721348011).

431164044021 is a wasteful number, since it uses less digits than its factorization.

431164044021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143721348010.

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

The spelling of 431164044021 in words is "four hundred thirty-one billion, one hundred sixty-four million, forty-four thousand, twenty-one".