245515563 has 8 divisors (see below), whose sum is σ = 363726800. Its totient is φ = 163677024.

The previous prime is 245515553. The next prime is 245515597. The reversal of 245515563 is 365515542.

245515563 is a `hidden beast` number, since 2 + 45 + 51 + 5 + 563 = 666.

It is not a de Polignac number, because 245515563 - 2⁵ = 245515531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245515553) 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 7 ways as a sum of consecutive naturals, for example, 4546558 + ... + 4546611.

It is an arithmetic number, because the mean of its divisors is an integer number (45465850).

Almost surely, 2^245515563 is an apocalyptic number.

245515563 is a deficient number, since it is larger than the sum of its proper divisors (118211237).

245515563 is an equidigital number, since it uses as much as digits as its factorization.

245515563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9093178 (or 9093172 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The square root of 245515563 is about 15668.9362434085. The cubic root of 245515563 is about 626.1710847530.

The spelling of 245515563 in words is "two hundred forty-five million, five hundred fifteen thousand, five hundred sixty-three".