501533240 has 64 divisors (see below), whose sum is σ = 1241170560. Its totient is φ = 181232640.

The previous prime is 501533213. The next prime is 501533243. The reversal of 501533240 is 42335105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501533243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14180 + ... + 34700.

It is an arithmetic number, because the mean of its divisors is an integer number (19393290).

Almost surely, 2^501533240 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 501533240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (620585280).

501533240 is an abundant number, since it is smaller than the sum of its proper divisors (739637320).

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

501533240 is a wasteful number, since it uses less digits than its factorization.

501533240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20592 (or 20588 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 501533240 is about 22394.9378208559. The cubic root of 501533240 is about 794.5109870565.

Adding to 501533240 its reverse (42335105), we get a palindrome (543868345).

The spelling of 501533240 in words is "five hundred one million, five hundred thirty-three thousand, two hundred forty".