2751721520 has 20 divisors (see below), whose sum is σ = 6397752720. Its totient is φ = 1100688576.

The previous prime is 2751721499. The next prime is 2751721543. The reversal of 2751721520 is 251271572.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×2751721520² = 15143942647262220800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17198180 + ... + 17198339.

It is an arithmetic number, because the mean of its divisors is an integer number (319887636).

Almost surely, 2^2751721520 is an apocalyptic number.

2751721520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2751721520 is an abundant number, since it is smaller than the sum of its proper divisors (3646031200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2751721520 is a wasteful number, since it uses less digits than its factorization.

2751721520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34396532 (or 34396526 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 32.

The square root of 2751721520 is about 52456.8538896492. The cubic root of 2751721520 is about 1401.3119538445.

The spelling of 2751721520 in words is "two billion, seven hundred fifty-one million, seven hundred twenty-one thousand, five hundred twenty".