2021144543 has 4 divisors (see below), whose sum is σ = 2204884968. Its totient is φ = 1837404120.

The previous prime is 2021144539. The next prime is 2021144557. The reversal of 2021144543 is 3454411202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2021144543 - 2² = 2021144539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021143543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91870196 + ... + 91870217.

It is an arithmetic number, because the mean of its divisors is an integer number (551221242).

Almost surely, 2^2021144543 is an apocalyptic number.

2021144543 is a deficient number, since it is larger than the sum of its proper divisors (183740425).

2021144543 is a wasteful number, since it uses less digits than its factorization.

2021144543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183740424.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 2021144543 is about 44957.1411791275. The cubic root of 2021144543 is about 1264.3455697296.

Adding to 2021144543 its reverse (3454411202), we get a palindrome (5475555745).

The spelling of 2021144543 in words is "two billion, twenty-one million, one hundred forty-four thousand, five hundred forty-three".