501640533 has 10 divisors (see below), whose sum is σ = 749364374. Its totient is φ = 334426968.

The previous prime is 501640523. The next prime is 501640547. The reversal of 501640533 is 335046105.

It can be written as a sum of positive squares in only one way, i.e., 391327524 + 110313009 = 19782^2 + 10503^2 .

It is not a de Polignac number, because 501640533 - 2⁵ = 501640501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 501640497 and 501640506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501640523) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3096466 + ... + 3096627.

Almost surely, 2^501640533 is an apocalyptic number.

It is an amenable number.

501640533 is a deficient number, since it is larger than the sum of its proper divisors (247723841).

501640533 is an equidigital number, since it uses as much as digits as its factorization.

501640533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6193105 (or 6193096 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 501640533 is about 22397.3331671429. Note that the first 3 decimals coincide. The cubic root of 501640533 is about 794.5676395921.

Adding to 501640533 its reverse (335046105), we get a palindrome (836686638).

The spelling of 501640533 in words is "five hundred one million, six hundred forty thousand, five hundred thirty-three".