216118354 has 4 divisors (see below), whose sum is σ = 324177534. Its totient is φ = 108059176.

The previous prime is 216118351. The next prime is 216118367. The reversal of 216118354 is 453811612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 213306025 + 2812329 = 14605^2 + 1677^2 .

It is not an unprimeable number, because it can be changed into a prime (216118351) 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 as a sum of consecutive naturals, namely, 54029587 + ... + 54029590.

Almost surely, 2^216118354 is an apocalyptic number.

216118354 is a deficient number, since it is larger than the sum of its proper divisors (108059180).

216118354 is a wasteful number, since it uses less digits than its factorization.

216118354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108059179.

The product of its digits is 5760, while the sum is 31.

The square root of 216118354 is about 14700.9643901344. The cubic root of 216118354 is about 600.1095670276.

Adding to 216118354 its reverse (453811612), we get a palindrome (669929966).

The spelling of 216118354 in words is "two hundred sixteen million, one hundred eighteen thousand, three hundred fifty-four".