2731557221357 has 8 divisors (see below), whose sum is σ = 2777917721280. Its totient is φ = 2685198818880.

The previous prime is 2731557221353. The next prime is 2731557221359. The reversal of 2731557221357 is 7531227551372.

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 2731557221357 - 2² = 2731557221353 is a prime.

It is a super-2 number, since 2×2731557221357² (a number of 26 digits) 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 (2731557221353) 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, 2223557 + ... + 3226037.

It is an arithmetic number, because the mean of its divisors is an integer number (347239715160).

Almost surely, 2^{2731557221357} is an apocalyptic number.

It is an amenable number.

2731557221357 is a deficient number, since it is larger than the sum of its proper divisors (46360499923).

2731557221357 is a wasteful number, since it uses less digits than its factorization.

2731557221357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048723.

The product of its digits is 3087000, while the sum is 50.

The spelling of 2731557221357 in words is "two trillion, seven hundred thirty-one billion, five hundred fifty-seven million, two hundred twenty-one thousand, three hundred fifty-seven".