154163381 has 2 divisors, whose sum is σ = 154163382. Its totient is φ = 154163380.

The previous prime is 154163377. The next prime is 154163389. The reversal of 154163381 is 183361451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77880625 + 76282756 = 8825^2 + 8734^2 .

It is a cyclic number.

It is not a de Polignac number, because 154163381 - 2² = 154163377 is a prime.

It is a super-2 number, since 2×154163381² = 47532696082702322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154163389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77081690 + 77081691.

It is an arithmetic number, because the mean of its divisors is an integer number (77081691).

Almost surely, 2^154163381 is an apocalyptic number.

It is an amenable number.

154163381 is a deficient number, since it is larger than the sum of its proper divisors (1).

154163381 is an equidigital number, since it uses as much as digits as its factorization.

154163381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 154163381 is about 12416.2547090497. The cubic root of 154163381 is about 536.2003281873.

The spelling of 154163381 in words is "one hundred fifty-four million, one hundred sixty-three thousand, three hundred eighty-one".