154431161 has 2 divisors, whose sum is σ = 154431162. Its totient is φ = 154431160.

The previous prime is 154431149. The next prime is 154431163. The reversal of 154431161 is 161134451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149915536 + 4515625 = 12244^2 + 2125^2 .

It is a cyclic number.

It is not a de Polignac number, because 154431161 - 2⁶ = 154431097 is a prime.

Together with 154431163, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 154431161.

It is not a weakly prime, because it can be changed into another prime (154431163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77215580 + 77215581.

It is an arithmetic number, because the mean of its divisors is an integer number (77215581).

Almost surely, 2^154431161 is an apocalyptic number.

It is an amenable number.

154431161 is a deficient number, since it is larger than the sum of its proper divisors (1).

154431161 is an equidigital number, since it uses as much as digits as its factorization.

154431161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 26.

The square root of 154431161 is about 12427.0334754518. The cubic root of 154431161 is about 536.5106065181.

The spelling of 154431161 in words is "one hundred fifty-four million, four hundred thirty-one thousand, one hundred sixty-one".