305223145 has 8 divisors (see below), whose sum is σ = 366467400. Its totient is φ = 244045440.

The previous prime is 305223143. The next prime is 305223167. The reversal of 305223145 is 541322503.

It can be written as a sum of positive squares in 4 ways, for example, as 72386064 + 232837081 = 8508^2 + 15259^2 .

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

It is not a de Polignac number, because 305223145 - 2¹ = 305223143 is a prime.

It is a super-2 number, since 2×305223145² = 186322336487382050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (305223143) 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, 5916 + ... + 25405.

It is an arithmetic number, because the mean of its divisors is an integer number (45808425).

Almost surely, 2^305223145 is an apocalyptic number.

It is an amenable number.

305223145 is a deficient number, since it is larger than the sum of its proper divisors (61244255).

305223145 is a wasteful number, since it uses less digits than its factorization.

305223145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33275.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 305223145 is about 17470.6366512500. The cubic root of 305223145 is about 673.2956692054.

Adding to 305223145 its reverse (541322503), we get a palindrome (846545648).

The spelling of 305223145 in words is "three hundred five million, two hundred twenty-three thousand, one hundred forty-five".