2153545081 has 2 divisors, whose sum is σ = 2153545082. Its totient is φ = 2153545080.

The previous prime is 2153545007. The next prime is 2153545099. The reversal of 2153545081 is 1805453512.

2153545081 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., 1382649856 + 770895225 = 37184^2 + 27765^2 .

It is a cyclic number.

It is not a de Polignac number, because 2153545081 - 2¹¹ = 2153543033 is a prime.

It is a super-2 number, since 2×2153545081² = 9275512831798593122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2153545981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076772540 + 1076772541.

It is an arithmetic number, because the mean of its divisors is an integer number (1076772541).

Almost surely, 2^2153545081 is an apocalyptic number.

It is an amenable number.

2153545081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2153545081 is an equidigital number, since it uses as much as digits as its factorization.

2153545081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24000, while the sum is 34.

The square root of 2153545081 is about 46406.3043238739. The cubic root of 2153545081 is about 1291.3718716733.

Adding to 2153545081 its reverse (1805453512), we get a palindrome (3958998593).

The spelling of 2153545081 in words is "two billion, one hundred fifty-three million, five hundred forty-five thousand, eighty-one".