216285428475 has 30 divisors (see below), whose sum is σ = 400635382620. Its totient is φ = 115352227440.

The previous prime is 216285428453. The next prime is 216285428483. The reversal of 216285428475 is 574824582612.

216285428475 is a `hidden beast` number, since 2 + 1 + 6 + 28 + 542 + 8 + 4 + 75 = 666.

It is not a de Polignac number, because 216285428475 - 2⁷ = 216285428347 is a prime.

It is a super-2 number, since 2×216285428475² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 53401785 + ... + 53405834.

It is an arithmetic number, because the mean of its divisors is an integer number (13354512754).

Almost surely, 2^216285428475 is an apocalyptic number.

216285428475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

216285428475 is a deficient number, since it is larger than the sum of its proper divisors (184349954145).

216285428475 is a wasteful number, since it uses less digits than its factorization.

216285428475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106807641 (or 106807627 counting only the distinct ones).

The product of its digits is 8601600, while the sum is 54.

The spelling of 216285428475 in words is "two hundred sixteen billion, two hundred eighty-five million, four hundred twenty-eight thousand, four hundred seventy-five".