501520133 has 4 divisors (see below), whose sum is σ = 502199520. Its totient is φ = 500840748.

The previous prime is 501520057. The next prime is 501520153. The reversal of 501520133 is 331025105.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 501520133 - 2¹⁸ = 501257989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501520153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338585 + ... + 340062.

It is an arithmetic number, because the mean of its divisors is an integer number (125549880).

Almost surely, 2^501520133 is an apocalyptic number.

It is an amenable number.

501520133 is a deficient number, since it is larger than the sum of its proper divisors (679387).

501520133 is an equidigital number, since it uses as much as digits as its factorization.

501520133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679386.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 501520133 is about 22394.6451858474. The cubic root of 501520133 is about 794.5040657830.

Adding to 501520133 its reverse (331025105), we get a palindrome (832545238).

The spelling of 501520133 in words is "five hundred one million, five hundred twenty thousand, one hundred thirty-three".