245305011220 has 24 divisors (see below), whose sum is σ = 515150533800. Its totient is φ = 98120097792.

The previous prime is 245305011139. The next prime is 245305011223. The reversal of 245305011220 is 22110503542.

It can be written as a sum of positive squares in 4 ways, for example, as 44168906896 + 201136104324 = 210164^2 + 448482^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245305011223) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1421796 + ... + 1584964.

It is an arithmetic number, because the mean of its divisors is an integer number (21464605575).

Almost surely, 2^245305011220 is an apocalyptic number.

245305011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245305011220 is an abundant number, since it is smaller than the sum of its proper divisors (269845522580).

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

245305011220 is a wasteful number, since it uses less digits than its factorization.

245305011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238347 (or 238345 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 245305011220 its reverse (22110503542), we get a palindrome (267415514762).

The spelling of 245305011220 in words is "two hundred forty-five billion, three hundred five million, eleven thousand, two hundred twenty".