154228391 has 2 divisors, whose sum is σ = 154228392. Its totient is φ = 154228390.

The previous prime is 154228309. The next prime is 154228397. The reversal of 154228391 is 193822451.

154228391 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 is a cyclic number.

It is not a de Polignac number, because 154228391 - 2¹⁴ = 154212007 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154228397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77114195 + 77114196.

It is an arithmetic number, because the mean of its divisors is an integer number (77114196).

Almost surely, 2^154228391 is an apocalyptic number.

154228391 is a deficient number, since it is larger than the sum of its proper divisors (1).

154228391 is an equidigital number, since it uses as much as digits as its factorization.

154228391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 35.

The square root of 154228391 is about 12418.8723723211. The cubic root of 154228391 is about 536.2756886791.

The spelling of 154228391 in words is "one hundred fifty-four million, two hundred twenty-eight thousand, three hundred ninety-one".