216403154 has 8 divisors (see below), whose sum is σ = 354114288. Its totient is φ = 98365060.

The previous prime is 216403151. The next prime is 216403189. The reversal of 216403154 is 451304612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×216403154² = 93660650122295432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216403151) 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 3 ways as a sum of consecutive naturals, for example, 4918232 + ... + 4918275.

It is an arithmetic number, because the mean of its divisors is an integer number (44264286).

Almost surely, 2^216403154 is an apocalyptic number.

216403154 is a deficient number, since it is larger than the sum of its proper divisors (137711134).

216403154 is a wasteful number, since it uses less digits than its factorization.

216403154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9836520.

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

The square root of 216403154 is about 14710.6476403998. The cubic root of 216403154 is about 600.3730587380.

Adding to 216403154 its reverse (451304612), we get a palindrome (667707766).

The spelling of 216403154 in words is "two hundred sixteen million, four hundred three thousand, one hundred fifty-four".