305228141 has 4 divisors (see below), whose sum is σ = 321292800. Its totient is φ = 289163484.

The previous prime is 305228107. The next prime is 305228153. The reversal of 305228141 is 141822503.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-305228141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 305228141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305228171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8032301 + ... + 8032338.

It is an arithmetic number, because the mean of its divisors is an integer number (80323200).

Almost surely, 2^305228141 is an apocalyptic number.

It is an amenable number.

305228141 is a deficient number, since it is larger than the sum of its proper divisors (16064659).

305228141 is a wasteful number, since it uses less digits than its factorization.

305228141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16064658.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 305228141 is about 17470.7796334336. The cubic root of 305228141 is about 673.2993427656.

The spelling of 305228141 in words is "three hundred five million, two hundred twenty-eight thousand, one hundred forty-one".