2942721181 has 4 divisors (see below), whose sum is σ = 2952764892. Its totient is φ = 2932677472.

The previous prime is 2942721163. The next prime is 2942721193. The reversal of 2942721181 is 1811272492.

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 2755305081 + 187416100 = 52491^2 + 13690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2942721181 is a prime.

It is a super-2 number, since 2×2942721181² = 17319215898212069522, which contains 22 as substring.

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 2942721181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2942721161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5021416 + ... + 5022001.

It is an arithmetic number, because the mean of its divisors is an integer number (738191223).

Almost surely, 2^2942721181 is an apocalyptic number.

It is an amenable number.

2942721181 is a deficient number, since it is larger than the sum of its proper divisors (10043711).

2942721181 is a wasteful number, since it uses less digits than its factorization.

2942721181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10043710.

The product of its digits is 16128, while the sum is 37.

The square root of 2942721181 is about 54246.8541115519. The cubic root of 2942721181 is about 1433.0115970789.

The spelling of 2942721181 in words is "two billion, nine hundred forty-two million, seven hundred twenty-one thousand, one hundred eighty-one".