520424501 has 4 divisors (see below), whose sum is σ = 521548992. Its totient is φ = 519300012.

The previous prime is 520424491. The next prime is 520424507. The reversal of 520424501 is 105424025.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-520424501 is a prime.

It is a super-2 number, since 2×520424501² = 541683322482198002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520424507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561551 + ... + 562476.

It is an arithmetic number, because the mean of its divisors is an integer number (130387248).

Almost surely, 2^520424501 is an apocalyptic number.

It is an amenable number.

520424501 is a deficient number, since it is larger than the sum of its proper divisors (1124491).

520424501 is a wasteful number, since it uses less digits than its factorization.

520424501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124490.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 520424501 is about 22812.8144033129. The cubic root of 520424501 is about 804.3639129829.

Adding to 520424501 its reverse (105424025), we get a palindrome (625848526).

The spelling of 520424501 in words is "five hundred twenty million, four hundred twenty-four thousand, five hundred one".