154431113 has 4 divisors (see below), whose sum is σ = 155072148. Its totient is φ = 153790080.

The previous prime is 154431097. The next prime is 154431127. The reversal of 154431113 is 311134451.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 115842169 + 38588944 = 10763^2 + 6212^2 .

It is a cyclic number.

It is not a de Polignac number, because 154431113 - 2⁴ = 154431097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154431163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320156 + ... + 320637.

It is an arithmetic number, because the mean of its divisors is an integer number (38768037).

Almost surely, 2^154431113 is an apocalyptic number.

It is an amenable number.

154431113 is a deficient number, since it is larger than the sum of its proper divisors (641035).

154431113 is an equidigital number, since it uses as much as digits as its factorization.

154431113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641034.

The product of its digits is 720, while the sum is 23.

The square root of 154431113 is about 12427.0315441782. The cubic root of 154431113 is about 536.5105509324.

Adding to 154431113 its reverse (311134451), we get a palindrome (465565564).

The spelling of 154431113 in words is "one hundred fifty-four million, four hundred thirty-one thousand, one hundred thirteen".