431326055313221 has 16 divisors (see below), whose sum is σ = 439228207649088. Its totient is φ = 423450931766400.

The previous prime is 431326055313217. The next prime is 431326055313253. The reversal of 431326055313221 is 122313550623134.

It is a cyclic number.

It is not a de Polignac number, because 431326055313221 - 2² = 431326055313217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431326055343221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241079681 + ... + 242862233.

It is an arithmetic number, because the mean of its divisors is an integer number (27451762978068).

Almost surely, 2^{431326055313221} is an apocalyptic number.

It is an amenable number.

431326055313221 is a deficient number, since it is larger than the sum of its proper divisors (7902152335867).

431326055313221 is a wasteful number, since it uses less digits than its factorization.

431326055313221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790132.

The product of its (nonzero) digits is 388800, while the sum is 41.

The spelling of 431326055313221 in words is "four hundred thirty-one trillion, three hundred twenty-six billion, fifty-five million, three hundred thirteen thousand, two hundred twenty-one".