218315123999153 has 4 divisors (see below), whose sum is σ = 218316203670768. Its totient is φ = 218314044327540.

The previous prime is 218315123999143. The next prime is 218315123999177. The reversal of 218315123999153 is 351999321513812.

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 a cyclic number.

It is not a de Polignac number, because 218315123999153 - 2³² = 218310829031857 is a prime.

It is a super-2 number, since 2×218315123999153² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218315123999143) 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, 539532443 + ... + 539936928.

It is an arithmetic number, because the mean of its divisors is an integer number (54579050917692).

Almost surely, 2^{218315123999153} is an apocalyptic number.

It is an amenable number.

218315123999153 is a deficient number, since it is larger than the sum of its proper divisors (1079671615).

218315123999153 is a wasteful number, since it uses less digits than its factorization.

218315123999153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079671614.

The product of its digits is 15746400, while the sum is 62.

The spelling of 218315123999153 in words is "two hundred eighteen trillion, three hundred fifteen billion, one hundred twenty-three million, nine hundred ninety-nine thousand, one hundred fifty-three".