505221303000 has 256 divisors, whose sum is σ = 1609320960000. Its totient is φ = 131928384000.

The previous prime is 505221302981. The next prime is 505221303001. The reversal of 505221303000 is 303122505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505221303001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31729041 + ... + 31744959.

It is an arithmetic number, because the mean of its divisors is an integer number (6286410000).

Almost surely, 2^505221303000 is an apocalyptic number.

505221303000 is a gapful number since it is divisible by the number (50) 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 505221303000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (804660480000).

505221303000 is an abundant number, since it is smaller than the sum of its proper divisors (1104099657000).

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

505221303000 is a wasteful number, since it uses less digits than its factorization.

505221303000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16163 (or 16149 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

Adding to 505221303000 its reverse (303122505), we get a palindrome (505524425505).

The spelling of 505221303000 in words is "five hundred five billion, two hundred twenty-one million, three hundred three thousand".