245231220220 has 72 divisors (see below), whose sum is σ = 602375024160. Its totient is φ = 83614688640.

The previous prime is 245231220209. The next prime is 245231220263. The reversal of 245231220220 is 22022132542.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 513880 + ... + 868639.

It is an arithmetic number, because the mean of its divisors is an integer number (8366319780).

Almost surely, 2^245231220220 is an apocalyptic number.

245231220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245231220220 is an abundant number, since it is smaller than the sum of its proper divisors (357143803940).

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

245231220220 is a wasteful number, since it uses less digits than its factorization.

245231220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382723 (or 1382714 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 245231220220 its reverse (22022132542), we get a palindrome (267253352762).

The spelling of 245231220220 in words is "two hundred forty-five billion, two hundred thirty-one million, two hundred twenty thousand, two hundred twenty".