216874475 has 12 divisors (see below), whose sum is σ = 280617456. Its totient is φ = 165955680.

The previous prime is 216874453. The next prime is 216874477. The reversal of 216874475 is 574478612.

It is not a de Polignac number, because 216874475 - 2²⁰ = 215825899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216874477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 188012 + ... + 189161.

It is an arithmetic number, because the mean of its divisors is an integer number (23384788).

Almost surely, 2^216874475 is an apocalyptic number.

216874475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

216874475 is a deficient number, since it is larger than the sum of its proper divisors (63742981).

216874475 is a wasteful number, since it uses less digits than its factorization.

216874475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377206 (or 377201 counting only the distinct ones).

The product of its digits is 376320, while the sum is 44.

The square root of 216874475 is about 14726.6586502166. The cubic root of 216874475 is about 600.8086088374.

It can be divided in two parts, 21687 and 4475, that added together give a palindrome (26162).

The spelling of 216874475 in words is "two hundred sixteen million, eight hundred seventy-four thousand, four hundred seventy-five".