216477172 has 6 divisors (see below), whose sum is σ = 378835058. Its totient is φ = 108238584.

The previous prime is 216477139. The next prime is 216477181. The reversal of 216477172 is 271774612.

It can be written as a sum of positive squares in only one way, i.e., 185940496 + 30536676 = 13636^2 + 5526^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27059643 + ... + 27059650.

Almost surely, 2^216477172 is an apocalyptic number.

It is an amenable number.

216477172 is a deficient number, since it is larger than the sum of its proper divisors (162357886).

216477172 is a wasteful number, since it uses less digits than its factorization.

216477172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54119297 (or 54119295 counting only the distinct ones).

The product of its digits is 32928, while the sum is 37.

The square root of 216477172 is about 14713.1632220947. The cubic root of 216477172 is about 600.4415009744.

The spelling of 216477172 in words is "two hundred sixteen million, four hundred seventy-seven thousand, one hundred seventy-two".