2731221071 has 8 divisors (see below), whose sum is σ = 2906416800. Its totient is φ = 2557640448.

The previous prime is 2731221049. The next prime is 2731221079. The reversal of 2731221071 is 1701221372.

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 2731221071 - 2⁶ = 2731221007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2731221071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2731221079) 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, 400286 + ... + 407051.

It is an arithmetic number, because the mean of its divisors is an integer number (363302100).

Almost surely, 2^2731221071 is an apocalyptic number.

2731221071 is a deficient number, since it is larger than the sum of its proper divisors (175195729).

2731221071 is a wasteful number, since it uses less digits than its factorization.

2731221071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807553.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 2731221071 is about 52261.0856278359. The cubic root of 2731221071 is about 1397.8233303011.

The spelling of 2731221071 in words is "two billion, seven hundred thirty-one million, two hundred twenty-one thousand, seventy-one".