216976275 has 18 divisors (see below), whose sum is σ = 388629020. Its totient is φ = 115720560.

The previous prime is 216976271. The next prime is 216976301. The reversal of 216976275 is 572679612.

216976275 is a `hidden beast` number, since 2 + 16 + 9 + 7 + 627 + 5 = 666.

It is not a de Polignac number, because 216976275 - 2² = 216976271 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 216976275.

It is not an unprimeable number, because it can be changed into a prime (216976271) by changing a digit.

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 in 17 ways as a sum of consecutive naturals, for example, 481945 + ... + 482394.

Almost surely, 2^216976275 is an apocalyptic number.

216976275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

216976275 is a deficient number, since it is larger than the sum of its proper divisors (171652745).

216976275 is a wasteful number, since it uses less digits than its factorization.

216976275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964355 (or 964347 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 216976275 is about 14730.1145616726. The cubic root of 216976275 is about 600.9025998417.

It can be divided in two parts, 21697 and 6275, that added together give a palindrome (27972).

The spelling of 216976275 in words is "two hundred sixteen million, nine hundred seventy-six thousand, two hundred seventy-five".