501343020 has 144 divisors (see below), whose sum is σ = 1614412800. Its totient is φ = 130527936.

The previous prime is 501343019. The next prime is 501343027. The reversal of 501343020 is 20343105.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 501342984 and 501343002.

It is not an unprimeable number, because it can be changed into a prime (501343027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 207781 + ... + 210179.

It is an arithmetic number, because the mean of its divisors is an integer number (11211200).

Almost surely, 2^501343020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 501343020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (807206400).

501343020 is an abundant number, since it is smaller than the sum of its proper divisors (1113069780).

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

501343020 is a wasteful number, since it uses less digits than its factorization.

501343020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466 (or 2452 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 501343020 is about 22390.6904761778. The cubic root of 501343020 is about 794.4105277856.

Adding to 501343020 its reverse (20343105), we get a palindrome (521686125).

The spelling of 501343020 in words is "five hundred one million, three hundred forty-three thousand, twenty".