2181142043153 has 2 divisors, whose sum is σ = 2181142043154. Its totient is φ = 2181142043152.

The previous prime is 2181142043131. The next prime is 2181142043173. The reversal of 2181142043153 is 3513402411812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2165995079824 + 15146963329 = 1471732^2 + 123073^2 .

It is a cyclic number.

It is not a de Polignac number, because 2181142043153 - 2¹⁰ = 2181142042129 is a prime.

It is a super-2 number, since 2×2181142043153² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2181142043173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1090571021576 + 1090571021577.

It is an arithmetic number, because the mean of its divisors is an integer number (1090571021577).

Almost surely, 2^{2181142043153} is an apocalyptic number.

It is an amenable number.

2181142043153 is a deficient number, since it is larger than the sum of its proper divisors (1).

2181142043153 is an equidigital number, since it uses as much as digits as its factorization.

2181142043153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

Adding to 2181142043153 its reverse (3513402411812), we get a palindrome (5694544454965).

The spelling of 2181142043153 in words is "two trillion, one hundred eighty-one billion, one hundred forty-two million, forty-three thousand, one hundred fifty-three".