2731540621 has 8 divisors (see below), whose sum is σ = 2782125344. Its totient is φ = 2681244720.

The previous prime is 2731540607. The next prime is 2731540633. The reversal of 2731540621 is 1260451372.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2731540621 - 2¹³ = 2731532429 is a prime.

It is a super-2 number, since 2×2731540621² = 14922628328346131282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2731540601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53070 + ... + 90991.

It is an arithmetic number, because the mean of its divisors is an integer number (347765668).

Almost surely, 2^2731540621 is an apocalyptic number.

It is an amenable number.

2731540621 is a deficient number, since it is larger than the sum of its proper divisors (50584723).

2731540621 is a wasteful number, since it uses less digits than its factorization.

2731540621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144411.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 2731540621 is about 52264.1427845134. The cubic root of 2731540621 is about 1397.8778427963.

Adding to 2731540621 its reverse (1260451372), we get a palindrome (3991991993).

The spelling of 2731540621 in words is "two billion, seven hundred thirty-one million, five hundred forty thousand, six hundred twenty-one".