305144133 has 8 divisors (see below), whose sum is σ = 464981568. Its totient is φ = 174368064.

The previous prime is 305144117. The next prime is 305144141. The reversal of 305144133 is 331441503.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 305144133 - 2⁴ = 305144117 is a prime.

It is a super-2 number, since 2×305144133² = 186225883808643378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305144153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7265316 + ... + 7265357.

It is an arithmetic number, because the mean of its divisors is an integer number (58122696).

Almost surely, 2^305144133 is an apocalyptic number.

It is an amenable number.

305144133 is a deficient number, since it is larger than the sum of its proper divisors (159837435).

305144133 is a wasteful number, since it uses less digits than its factorization.

305144133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14530683.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 305144133 is about 17468.3752249601. The cubic root of 305144133 is about 673.2375663285.

Adding to 305144133 its reverse (331441503), we get a palindrome (636585636).

The spelling of 305144133 in words is "three hundred five million, one hundred forty-four thousand, one hundred thirty-three".