216322154 has 32 divisors (see below), whose sum is σ = 342144000. Its totient is φ = 102453120.

The previous prime is 216322133. The next prime is 216322177. The reversal of 216322154 is 451223612.

It is a happy number.

It is a super-2 number, since 2×216322154² = 93590548622399432, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1086947 + ... + 1087145.

It is an arithmetic number, because the mean of its divisors is an integer number (10692000).

Almost surely, 2^216322154 is an apocalyptic number.

216322154 is a deficient number, since it is larger than the sum of its proper divisors (125821846).

216322154 is a wasteful number, since it uses less digits than its factorization.

216322154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518.

The product of its digits is 2880, while the sum is 26.

The square root of 216322154 is about 14707.8942748444. The cubic root of 216322154 is about 600.2981425679.

Adding to 216322154 its reverse (451223612), we get a palindrome (667545766).

The spelling of 216322154 in words is "two hundred sixteen million, three hundred twenty-two thousand, one hundred fifty-four".