245355124221 has 16 divisors (see below), whose sum is σ = 363755030400. Its totient is φ = 163450401984.

The previous prime is 245355124187. The next prime is 245355124253. The reversal of 245355124221 is 122421553542.

245355124221 is a `hidden beast` number, since 2 + 45 + 3 + 551 + 2 + 42 + 21 = 666.

245355124221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 245355124221 - 2⁹ = 245355123709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245355124321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3286876 + ... + 3360693.

It is an arithmetic number, because the mean of its divisors is an integer number (22734689400).

Almost surely, 2^245355124221 is an apocalyptic number.

It is an amenable number.

245355124221 is a deficient number, since it is larger than the sum of its proper divisors (118399906179).

245355124221 is a wasteful number, since it uses less digits than its factorization.

245355124221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6648945 (or 6648939 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

Adding to 245355124221 its reverse (122421553542), we get a palindrome (367776677763).

The spelling of 245355124221 in words is "two hundred forty-five billion, three hundred fifty-five million, one hundred twenty-four thousand, two hundred twenty-one".