501720050 has 24 divisors (see below), whose sum is σ = 1004985156. Its totient is φ = 185250240.

The previous prime is 501720047. The next prime is 501720071. The reversal of 501720050 is 50027105.

It can be written as a sum of positive squares in 6 ways, for example, as 151019521 + 350700529 = 12289^2 + 18727^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 385289 + ... + 386588.

Almost surely, 2^501720050 is an apocalyptic number.

501720050 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

501720050 is an abundant number, since it is smaller than the sum of its proper divisors (503265106).

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

501720050 is a wasteful number, since it uses less digits than its factorization.

501720050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771902 (or 771897 counting only the distinct ones).

The product of its (nonzero) digits is 350, while the sum is 20.

The square root of 501720050 is about 22399.1082411778. The cubic root of 501720050 is about 794.6096207139.

Adding to 501720050 its reverse (50027105), we get a palindrome (551747155).

The spelling of 501720050 in words is "five hundred one million, seven hundred twenty thousand, fifty".