218148347 has 4 divisors (see below), whose sum is σ = 219084840. Its totient is φ = 217211856.

The previous prime is 218148317. The next prime is 218148373. The reversal of 218148347 is 743841812.

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 218148347 - 2¹⁶ = 218082811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 218148347.

It is not an unprimeable number, because it can be changed into a prime (218148317) 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, 467897 + ... + 468362.

It is an arithmetic number, because the mean of its divisors is an integer number (54771210).

Almost surely, 2^218148347 is an apocalyptic number.

218148347 is a deficient number, since it is larger than the sum of its proper divisors (936493).

218148347 is an equidigital number, since it uses as much as digits as its factorization.

218148347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936492.

The product of its digits is 43008, while the sum is 38.

The square root of 218148347 is about 14769.8458692026. The cubic root of 218148347 is about 601.9826514575.

The spelling of 218148347 in words is "two hundred eighteen million, one hundred forty-eight thousand, three hundred forty-seven".