506520445631 has 4 divisors (see below), whose sum is σ = 506522966664. Its totient is φ = 506517924600.

The previous prime is 506520445609. The next prime is 506520445649. The reversal of 506520445631 is 136544025605.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-506520445631 is a prime.

It is a super-2 number, since 2×506520445631² (a number of 24 digits) 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 (506520445331) 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, 930305 + ... + 1370586.

It is an arithmetic number, because the mean of its divisors is an integer number (126630741666).

Almost surely, 2^506520445631 is an apocalyptic number.

506520445631 is a deficient number, since it is larger than the sum of its proper divisors (2521033).

506520445631 is a wasteful number, since it uses less digits than its factorization.

506520445631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2521032.

The product of its (nonzero) digits is 432000, while the sum is 41.

The spelling of 506520445631 in words is "five hundred six billion, five hundred twenty million, four hundred forty-five thousand, six hundred thirty-one".