245441815 has 4 divisors (see below), whose sum is σ = 294530184. Its totient is φ = 196353448.

The previous prime is 245441813. The next prime is 245441821. The reversal of 245441815 is 518144542.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 245441815 - 2¹ = 245441813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245441813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24544177 + ... + 24544186.

It is an arithmetic number, because the mean of its divisors is an integer number (73632546).

Almost surely, 2^245441815 is an apocalyptic number.

245441815 is a deficient number, since it is larger than the sum of its proper divisors (49088369).

245441815 is an equidigital number, since it uses as much as digits as its factorization.

245441815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49088368.

The product of its digits is 25600, while the sum is 34.

The square root of 245441815 is about 15666.5827480022. The cubic root of 245441815 is about 626.1083820209.

The spelling of 245441815 in words is "two hundred forty-five million, four hundred forty-one thousand, eight hundred fifteen".