501431513 has 4 divisors (see below), whose sum is σ = 547016208. Its totient is φ = 455846820.

The previous prime is 501431461. The next prime is 501431531. The reversal of 501431513 is 315134105.

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 not a de Polignac number, because 501431513 - 2⁶ = 501431449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501431543) 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, 22792331 + ... + 22792352.

It is an arithmetic number, because the mean of its divisors is an integer number (136754052).

Almost surely, 2^501431513 is an apocalyptic number.

It is an amenable number.

501431513 is a deficient number, since it is larger than the sum of its proper divisors (45584695).

501431513 is a wasteful number, since it uses less digits than its factorization.

501431513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45584694.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 501431513 is about 22392.6665004416. Note that the first 3 decimals coincide. The cubic root of 501431513 is about 794.4572660015.

Adding to 501431513 its reverse (315134105), we get a palindrome (816565618).

The spelling of 501431513 in words is "five hundred one million, four hundred thirty-one thousand, five hundred thirteen".