520100420211523 has 4 divisors (see below), whose sum is σ = 520134576687000. Its totient is φ = 520066263736048.

The previous prime is 520100420211509. The next prime is 520100420211539. The reversal of 520100420211523 is 325112024001025.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 520100420211523 - 2²⁵ = 520100386657091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520100420211491 and 520100420211500.

It is not an unprimeable number, because it can be changed into a prime (520100420211563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17078214898 + ... + 17078245351.

It is an arithmetic number, because the mean of its divisors is an integer number (130033644171750).

Almost surely, 2^{520100420211523} is an apocalyptic number.

520100420211523 is a deficient number, since it is larger than the sum of its proper divisors (34156475477).

520100420211523 is a wasteful number, since it uses less digits than its factorization.

520100420211523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34156475476.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 520100420211523 its reverse (325112024001025), we get a palindrome (845212444212548).

The spelling of 520100420211523 in words is "five hundred twenty trillion, one hundred billion, four hundred twenty million, two hundred eleven thousand, five hundred twenty-three".