245864165 has 4 divisors (see below), whose sum is σ = 295037004. Its totient is φ = 196691328.

The previous prime is 245864159. The next prime is 245864189. The reversal of 245864165 is 561468542.

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 91259809 + 154604356 = 9553^2 + 12434^2 .

It is a cyclic number.

It is not a de Polignac number, because 245864165 - 2¹⁰ = 245863141 is a prime.

It is a super-2 number, since 2×245864165² = 120898375262294450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24586412 + ... + 24586421.

It is an arithmetic number, because the mean of its divisors is an integer number (73759251).

Almost surely, 2^245864165 is an apocalyptic number.

It is an amenable number.

245864165 is a deficient number, since it is larger than the sum of its proper divisors (49172839).

245864165 is an equidigital number, since it uses as much as digits as its factorization.

245864165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49172838.

The product of its digits is 230400, while the sum is 41.

The square root of 245864165 is about 15680.0562817867. The cubic root of 245864165 is about 626.4673066555.

The spelling of 245864165 in words is "two hundred forty-five million, eight hundred sixty-four thousand, one hundred sixty-five".