245501220 has 48 divisors (see below), whose sum is σ = 688101120. Its totient is φ = 65400576.

The previous prime is 245501219. The next prime is 245501231. The reversal of 245501220 is 22105542.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95269 + ... + 97811.

It is an arithmetic number, because the mean of its divisors is an integer number (14335440).

Almost surely, 2^245501220 is an apocalyptic number.

245501220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245501220 is an abundant number, since it is smaller than the sum of its proper divisors (442599900).

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

245501220 is a wasteful number, since it uses less digits than its factorization.

245501220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4164 (or 4162 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 245501220 is about 15668.4785477085. The cubic root of 245501220 is about 626.1588908936.

Adding to 245501220 its reverse (22105542), we get a palindrome (267606762).

The spelling of 245501220 in words is "two hundred forty-five million, five hundred one thousand, two hundred twenty".