2021556512 has 12 divisors (see below), whose sum is σ = 3979939446. Its totient is φ = 1010778240.

The previous prime is 2021556491. The next prime is 2021556521. The reversal of 2021556512 is 2156551202.

It can be written as a sum of positive squares in only one way, i.e., 1492740496 + 528816016 = 38636^2 + 22996^2 .

It is a super-2 number, since 2×2021556512² = 8173381462419212288, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31586789 + ... + 31586852.

Almost surely, 2^2021556512 is an apocalyptic number.

It is an amenable number.

2021556512 is a deficient number, since it is larger than the sum of its proper divisors (1958382934).

2021556512 is an equidigital number, since it uses as much as digits as its factorization.

2021556512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63173651 (or 63173643 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 2021556512 is about 44961.7227427953. The cubic root of 2021556512 is about 1264.4314675601.

The spelling of 2021556512 in words is "two billion, twenty-one million, five hundred fifty-six thousand, five hundred twelve".