2731521444721 has 4 divisors (see below), whose sum is σ = 2819635039744. Its totient is φ = 2643407849700.

The previous prime is 2731521444599. The next prime is 2731521444739. The reversal of 2731521444721 is 1274441251372.

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 cyclic number.

It is not a de Polignac number, because 2731521444721 - 2⁷ = 2731521444593 is a prime.

It is a super-2 number, since 2×2731521444721² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2731521444761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44056797465 + ... + 44056797526.

It is an arithmetic number, because the mean of its divisors is an integer number (704908759936).

Almost surely, 2^{2731521444721} is an apocalyptic number.

It is an amenable number.

2731521444721 is a deficient number, since it is larger than the sum of its proper divisors (88113595023).

2731521444721 is an equidigital number, since it uses as much as digits as its factorization.

2731521444721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88113595022.

The product of its digits is 376320, while the sum is 43.

The spelling of 2731521444721 in words is "two trillion, seven hundred thirty-one billion, five hundred twenty-one million, four hundred forty-four thousand, seven hundred twenty-one".