245105305 has 4 divisors (see below), whose sum is σ = 294126372. Its totient is φ = 196084240.

The previous prime is 245105297. The next prime is 245105327. The reversal of 245105305 is 503501542.

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 26183689 + 218921616 = 5117^2 + 14796^2 .

It is not a de Polignac number, because 245105305 - 2³ = 245105297 is a prime.

It is a super-2 number, since 2×245105305² = 120153221078286050, which contains 22 as substring.

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 245105305.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24510526 + ... + 24510535.

It is an arithmetic number, because the mean of its divisors is an integer number (73531593).

Almost surely, 2^245105305 is an apocalyptic number.

It is an amenable number.

245105305 is a deficient number, since it is larger than the sum of its proper divisors (49021067).

245105305 is an equidigital number, since it uses as much as digits as its factorization.

245105305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49021066.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 245105305 is about 15655.8393259512. The cubic root of 245105305 is about 625.8221117375.

Adding to 245105305 its reverse (503501542), we get a palindrome (748606847).

The spelling of 245105305 in words is "two hundred forty-five million, one hundred five thousand, three hundred five".