2154281113 has 2 divisors, whose sum is σ = 2154281114. Its totient is φ = 2154281112.

The previous prime is 2154281111. The next prime is 2154281137. The reversal of 2154281113 is 3111824512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1838437129 + 315843984 = 42877^2 + 17772^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154281113 - 2¹ = 2154281111 is a prime.

It is a super-2 number, since 2×2154281113² = 9281854227657037538, which contains 22 as substring.

Together with 2154281111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2154281111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077140556 + 1077140557.

It is an arithmetic number, because the mean of its divisors is an integer number (1077140557).

Almost surely, 2^2154281113 is an apocalyptic number.

It is an amenable number.

2154281113 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154281113 is an equidigital number, since it uses as much as digits as its factorization.

2154281113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 28.

The square root of 2154281113 is about 46414.2339482189. The cubic root of 2154281113 is about 1291.5189752817.

The spelling of 2154281113 in words is "two billion, one hundred fifty-four million, two hundred eighty-one thousand, one hundred thirteen".