245205513 has 12 divisors (see below), whose sum is σ = 404783808. Its totient is φ = 140117400.

The previous prime is 245205497. The next prime is 245205539. The reversal of 245205513 is 315502542.

It is a happy number.

It is not a de Polignac number, because 245205513 - 2⁴ = 245205497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245205563) 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 11 ways as a sum of consecutive naturals, for example, 1946013 + ... + 1946138.

It is an arithmetic number, because the mean of its divisors is an integer number (33731984).

Almost surely, 2^245205513 is an apocalyptic number.

It is an amenable number.

245205513 is a deficient number, since it is larger than the sum of its proper divisors (159578295).

245205513 is a wasteful number, since it uses less digits than its factorization.

245205513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3892164 (or 3892161 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 245205513 is about 15659.0393383502. The cubic root of 245205513 is about 625.9073864289.

The spelling of 245205513 in words is "two hundred forty-five million, two hundred five thousand, five hundred thirteen".