2891481304321 has 4 divisors (see below), whose sum is σ = 2891584906452. Its totient is φ = 2891377702192.

The previous prime is 2891481304319. The next prime is 2891481304331. The reversal of 2891481304321 is 1234031841982.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2526017529025 + 365463775296 = 1589345^2 + 604536^2 .

It is a cyclic number.

It is not a de Polignac number, because 2891481304321 - 2¹ = 2891481304319 is a prime.

It is a super-3 number, since 3×2891481304321³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2891481304301) 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, 51759190 + ... + 51815023.

It is an arithmetic number, because the mean of its divisors is an integer number (722896226613).

Almost surely, 2^{2891481304321} is an apocalyptic number.

It is an amenable number.

2891481304321 is a deficient number, since it is larger than the sum of its proper divisors (103602131).

2891481304321 is a wasteful number, since it uses less digits than its factorization.

2891481304321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103602130.

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 2891481304321 in words is "two trillion, eight hundred ninety-one billion, four hundred eighty-one million, three hundred four thousand, three hundred twenty-one".