245321221200 has 480 divisors, whose sum is σ = 875804659200. Its totient is φ = 58196736000.

The previous prime is 245321221181. The next prime is 245321221279. The reversal of 245321221200 is 2122123542.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 209496615 + ... + 209497785.

It is an arithmetic number, because the mean of its divisors is an integer number (1824593040).

Almost surely, 2^245321221200 is an apocalyptic number.

245321221200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245321221200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (437902329600).

245321221200 is an abundant number, since it is smaller than the sum of its proper divisors (630483438000).

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

245321221200 is a wasteful number, since it uses less digits than its factorization.

245321221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531 (or 1520 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 245321221200 its reverse (2122123542), we get a palindrome (247443344742).

The spelling of 245321221200 in words is "two hundred forty-five billion, three hundred twenty-one million, two hundred twenty-one thousand, two hundred".