2154544021 has 8 divisors (see below), whose sum is σ = 2569394304. Its totient is φ = 1766458320.

The previous prime is 2154543997. The next prime is 2154544057. The reversal of 2154544021 is 1204454512.

2154544021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2154544021 - 2¹¹ = 2154541973 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 (2154544081) 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, 6690970 + ... + 6691291.

It is an arithmetic number, because the mean of its divisors is an integer number (321174288).

Almost surely, 2^2154544021 is an apocalyptic number.

It is an amenable number.

2154544021 is a deficient number, since it is larger than the sum of its proper divisors (414850283).

2154544021 is a wasteful number, since it uses less digits than its factorization.

2154544021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13382291.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 2154544021 is about 46417.0660533386. The cubic root of 2154544021 is about 1291.5715120432.

Adding to 2154544021 its reverse (1204454512), we get a palindrome (3358998533).

The spelling of 2154544021 in words is "two billion, one hundred fifty-four million, five hundred forty-four thousand, twenty-one".