218150404 has 6 divisors (see below), whose sum is σ = 381763214. Its totient is φ = 109075200.

The previous prime is 218150389. The next prime is 218150407. The reversal of 218150404 is 404051812.

It can be written as a sum of positive squares in only one way, i.e., 175509504 + 42640900 = 13248^2 + 6530^2 .

It is not an unprimeable number, because it can be changed into a prime (218150407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27268797 + ... + 27268804.

Almost surely, 2^218150404 is an apocalyptic number.

It is an amenable number.

218150404 is a deficient number, since it is larger than the sum of its proper divisors (163612810).

218150404 is a wasteful number, since it uses less digits than its factorization.

218150404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54537605 (or 54537603 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 218150404 is about 14769.9155041591. The cubic root of 218150404 is about 601.9845435559.

The spelling of 218150404 in words is "two hundred eighteen million, one hundred fifty thousand, four hundred four".