501235513 has 4 divisors (see below), whose sum is σ = 501404560. Its totient is φ = 501066468.

The previous prime is 501235499. The next prime is 501235549. The reversal of 501235513 is 315532105.

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 501235513 - 2²¹ = 499138361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501205513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79995 + ... + 86032.

It is an arithmetic number, because the mean of its divisors is an integer number (125351140).

Almost surely, 2^501235513 is an apocalyptic number.

It is an amenable number.

501235513 is a deficient number, since it is larger than the sum of its proper divisors (169047).

501235513 is a wasteful number, since it uses less digits than its factorization.

501235513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169046.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 501235513 is about 22388.2896398988. The cubic root of 501235513 is about 794.3537397884.

Adding to 501235513 its reverse (315532105), we get a palindrome (816767618).

The spelling of 501235513 in words is "five hundred one million, two hundred thirty-five thousand, five hundred thirteen".