245617530 has 64 divisors (see below), whose sum is σ = 645719040. Its totient is φ = 59515904.

The previous prime is 245617487. The next prime is 245617549. The reversal of 245617530 is 35716542.

It is a junction number, because it is equal to n+sod(n) for n = 245617491 and 245617500.

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 31 ways as a sum of consecutive naturals, for example, 6487 + ... + 23093.

It is an arithmetic number, because the mean of its divisors is an integer number (10089360).

Almost surely, 2^245617530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245617530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322859520).

245617530 is an abundant number, since it is smaller than the sum of its proper divisors (400101510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245617530 is a wasteful number, since it uses less digits than its factorization.

245617530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16663.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 245617530 is about 15672.1897002302. The cubic root of 245617530 is about 626.2577594347.

The spelling of 245617530 in words is "two hundred forty-five million, six hundred seventeen thousand, five hundred thirty".