218103196523 has 4 divisors (see below), whose sum is σ = 223175363928. Its totient is φ = 213031029120.

The previous prime is 218103196483. The next prime is 218103196529. The reversal of 218103196523 is 325691301812.

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 218103196523 - 2¹² = 218103192427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218103196529) 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, 2536083638 + ... + 2536083723.

It is an arithmetic number, because the mean of its divisors is an integer number (55793840982).

Almost surely, 2^218103196523 is an apocalyptic number.

218103196523 is a deficient number, since it is larger than the sum of its proper divisors (5072167405).

218103196523 is an equidigital number, since it uses as much as digits as its factorization.

218103196523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5072167404.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 218103196523 in words is "two hundred eighteen billion, one hundred three million, one hundred ninety-six thousand, five hundred twenty-three".