2721511945 has 8 divisors (see below), whose sum is σ = 3266973000. Its totient is φ = 2176437120.

The previous prime is 2721511943. The next prime is 2721511967. The reversal of 2721511945 is 5491151272.

It can be written as a sum of positive squares in 4 ways, for example, as 1050991561 + 1670520384 = 32419^2 + 40872^2 .

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

It is not a de Polignac number, because 2721511945 - 2¹ = 2721511943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2721511943) 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, 80820 + ... + 109429.

It is an arithmetic number, because the mean of its divisors is an integer number (408371625).

Almost surely, 2^2721511945 is an apocalyptic number.

It is an amenable number.

2721511945 is a deficient number, since it is larger than the sum of its proper divisors (545461055).

2721511945 is a wasteful number, since it uses less digits than its factorization.

2721511945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193115.

The product of its digits is 25200, while the sum is 37.

The square root of 2721511945 is about 52168.1123388608. The cubic root of 2721511945 is about 1396.1650053109.

The spelling of 2721511945 in words is "two billion, seven hundred twenty-one million, five hundred eleven thousand, nine hundred forty-five".