218461813332 has 48 divisors (see below), whose sum is σ = 582651672960. Its totient is φ = 62408356992.

The previous prime is 218461813331. The next prime is 218461813373. The reversal of 218461813332 is 233318164812.

It is a super-2 number, since 2×218461813332² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218461813331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 383218 + ... + 764054.

It is an arithmetic number, because the mean of its divisors is an integer number (12138576520).

Almost surely, 2^218461813332 is an apocalyptic number.

It is an amenable number.

218461813332 is an abundant number, since it is smaller than the sum of its proper divisors (364189859628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218461813332 is a wasteful number, since it uses less digits than its factorization.

218461813332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387680 (or 387678 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The spelling of 218461813332 in words is "two hundred eighteen billion, four hundred sixty-one million, eight hundred thirteen thousand, three hundred thirty-two".