520100100687 has 4 divisors (see below), whose sum is σ = 693466800920. Its totient is φ = 346733400456.

The previous prime is 520100100679. The next prime is 520100100703. The reversal of 520100100687 is 786001001025.

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

It is not a de Polignac number, because 520100100687 - 2³ = 520100100679 is a prime.

It is a super-2 number, since 2×520100100687² (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 (520100100617) 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, 86683350112 + ... + 86683350117.

It is an arithmetic number, because the mean of its divisors is an integer number (173366700230).

Almost surely, 2^520100100687 is an apocalyptic number.

520100100687 is a deficient number, since it is larger than the sum of its proper divisors (173366700233).

520100100687 is a wasteful number, since it uses less digits than its factorization.

520100100687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173366700232.

The product of its (nonzero) digits is 3360, while the sum is 30.

The spelling of 520100100687 in words is "five hundred twenty billion, one hundred million, one hundred thousand, six hundred eighty-seven".