154557281 has 2 divisors, whose sum is σ = 154557282. Its totient is φ = 154557280.

The previous prime is 154557241. The next prime is 154557283. The reversal of 154557281 is 182755451.

154557281 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., 140185600 + 14371681 = 11840^2 + 3791^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154557281 is a prime.

It is a super-2 number, since 2×154557281² = 47775906220225922, which contains 22 as substring.

Together with 154557283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (154557283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77278640 + 77278641.

It is an arithmetic number, because the mean of its divisors is an integer number (77278641).

Almost surely, 2^154557281 is an apocalyptic number.

It is an amenable number.

154557281 is a deficient number, since it is larger than the sum of its proper divisors (1).

154557281 is an equidigital number, since it uses as much as digits as its factorization.

154557281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56000, while the sum is 38.

The square root of 154557281 is about 12432.1068608663. The cubic root of 154557281 is about 536.6566182979.

The spelling of 154557281 in words is "one hundred fifty-four million, five hundred fifty-seven thousand, two hundred eighty-one".