218974419 has 6 divisors (see below), whose sum is σ = 316296396. Its totient is φ = 145982940.

The previous prime is 218974417. The next prime is 218974439. The reversal of 218974419 is 914479812.

It is a happy number.

It is not a de Polignac number, because 218974419 - 2¹ = 218974417 is a prime.

It is a super-2 number, since 2×218974419² = 95899592352775122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (218974417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12165237 + ... + 12165254.

It is an arithmetic number, because the mean of its divisors is an integer number (52716066).

Almost surely, 2^218974419 is an apocalyptic number.

218974419 is a deficient number, since it is larger than the sum of its proper divisors (97321977).

218974419 is a wasteful number, since it uses less digits than its factorization.

218974419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24330497 (or 24330494 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 218974419 is about 14797.7842598140. The cubic root of 218974419 is about 602.7415457984.

The spelling of 218974419 in words is "two hundred eighteen million, nine hundred seventy-four thousand, four hundred nineteen".