216288575 has 6 divisors (see below), whose sum is σ = 268197864. Its totient is φ = 173030840.

The previous prime is 216288559. The next prime is 216288593. The reversal of 216288575 is 575882612.

It is not a de Polignac number, because 216288575 - 2⁴ = 216288559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4325747 + ... + 4325796.

It is an arithmetic number, because the mean of its divisors is an integer number (44699644).

Almost surely, 2^216288575 is an apocalyptic number.

216288575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

216288575 is a deficient number, since it is larger than the sum of its proper divisors (51909289).

216288575 is an equidigital number, since it uses as much as digits as its factorization.

216288575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8651553 (or 8651548 counting only the distinct ones).

The product of its digits is 268800, while the sum is 44.

The square root of 216288575 is about 14706.7527007154. The cubic root of 216288575 is about 600.2670801701.

It can be divided in two parts, 21628 and 8575, that added together give a palindrome (30203).

The spelling of 216288575 in words is "two hundred sixteen million, two hundred eighty-eight thousand, five hundred seventy-five".