2021551543 has 8 divisors (see below), whose sum is σ = 2215783296. Its totient is φ = 1829062200.

The previous prime is 2021551513. The next prime is 2021551579. The reversal of 2021551543 is 3451551202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021551543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021551513) 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, 433171 + ... + 437812.

It is an arithmetic number, because the mean of its divisors is an integer number (276972912).

Almost surely, 2^2021551543 is an apocalyptic number.

2021551543 is a deficient number, since it is larger than the sum of its proper divisors (194231753).

2021551543 is a wasteful number, since it uses less digits than its factorization.

2021551543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871205.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 2021551543 is about 44961.6674846474. The cubic root of 2021551543 is about 1264.4304315655.

The spelling of 2021551543 in words is "two billion, twenty-one million, five hundred fifty-one thousand, five hundred forty-three".