2154544081 has 2 divisors, whose sum is σ = 2154544082. Its totient is φ = 2154544080.

The previous prime is 2154544057. The next prime is 2154544099. The reversal of 2154544081 is 1804454512.

2154544081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1919228481 + 235315600 = 43809^2 + 15340^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154544081 - 2¹⁵ = 2154511313 is a prime.

It is a super-2 number, since 2×2154544081² = 9284120393944269122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2154524081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077272040 + 1077272041.

It is an arithmetic number, because the mean of its divisors is an integer number (1077272041).

Almost surely, 2^2154544081 is an apocalyptic number.

It is an amenable number.

2154544081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154544081 is an equidigital number, since it uses as much as digits as its factorization.

2154544081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25600, while the sum is 34.

The square root of 2154544081 is about 46417.0666996526. The cubic root of 2154544081 is about 1291.5715240324.

Adding to 2154544081 its reverse (1804454512), we get a palindrome (3958998593).

The spelling of 2154544081 in words is "two billion, one hundred fifty-four million, five hundred forty-four thousand, eighty-one".