2731712404621 has 4 divisors (see below), whose sum is σ = 2731867659612. Its totient is φ = 2731557149632.

The previous prime is 2731712404559. The next prime is 2731712404633. The reversal of 2731712404621 is 1264042171372.

It is a happy number.

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 1111578010596 + 1620134394025 = 1054314^2 + 1272845^2 .

It is a cyclic number.

It is not a de Polignac number, because 2731712404621 - 2¹⁵ = 2731712371853 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 (2731718404621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77601100 + ... + 77636293.

It is an arithmetic number, because the mean of its divisors is an integer number (682966914903).

Almost surely, 2^{2731712404621} is an apocalyptic number.

It is an amenable number.

2731712404621 is a deficient number, since it is larger than the sum of its proper divisors (155254991).

2731712404621 is a wasteful number, since it uses less digits than its factorization.

2731712404621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155254990.

The product of its (nonzero) digits is 112896, while the sum is 40.

Adding to 2731712404621 its reverse (1264042171372), we get a palindrome (3995754575993).

The spelling of 2731712404621 in words is "two trillion, seven hundred thirty-one billion, seven hundred twelve million, four hundred four thousand, six hundred twenty-one".