216475875 has 256 divisors, whose sum is σ = 539136000. Its totient is φ = 84672000.

The previous prime is 216475871. The next prime is 216475901. The reversal of 216475875 is 578574612.

216475875 is a `hidden beast` number, since 2 + 1 + 64 + 7 + 587 + 5 = 666.

It is not a de Polignac number, because 216475875 - 2² = 216475871 is a prime.

It is a super-3 number, since 3×216475875³ (a number of 26 digits) contains 333 as substring.

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 216475875.

It is not an unprimeable number, because it can be changed into a prime (216475871) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 12733867 + ... + 12733883.

It is an arithmetic number, because the mean of its divisors is an integer number (2106000).

Almost surely, 2^216475875 is an apocalyptic number.

216475875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

216475875 is an abundant number, since it is smaller than the sum of its proper divisors (322660125).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216475875 is a wasteful number, since it uses less digits than its factorization.

216475875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73 (or 43 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 216475875 is about 14713.1191458508. The cubic root of 216475875 is about 600.4403018115.

The spelling of 216475875 in words is "two hundred sixteen million, four hundred seventy-five thousand, eight hundred seventy-five".