2981730521 has 24 divisors (see below), whose sum is σ = 3965996160. Its totient is φ = 2186743680.

The previous prime is 2981730509. The next prime is 2981730523. The reversal of 2981730521 is 1250371892.

It is not a de Polignac number, because 2981730521 - 2¹⁸ = 2981468377 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2981730523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89141 + ... + 117938.

It is an arithmetic number, because the mean of its divisors is an integer number (165249840).

Almost surely, 2^2981730521 is an apocalyptic number.

It is an amenable number.

2981730521 is a deficient number, since it is larger than the sum of its proper divisors (984265639).

2981730521 is a wasteful number, since it uses less digits than its factorization.

2981730521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207125 (or 207114 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 2981730521 is about 54605.2243013432. The cubic root of 2981730521 is about 1439.3159239540.

The spelling of 2981730521 in words is "two billion, nine hundred eighty-one million, seven hundred thirty thousand, five hundred twenty-one".