216334375 has 24 divisors (see below), whose sum is σ = 277857216. Its totient is φ = 168300000.

The previous prime is 216334351. The next prime is 216334381. The reversal of 216334375 is 573433612.

It is not a de Polignac number, because 216334375 - 2¹⁵ = 216301607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216334375.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114690 + ... + 116560.

It is an arithmetic number, because the mean of its divisors is an integer number (11577384).

Almost surely, 2^216334375 is an apocalyptic number.

216334375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

216334375 is a deficient number, since it is larger than the sum of its proper divisors (61522841).

216334375 is an frugal number, since it uses more digits than its factorization.

216334375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1933 (or 1913 counting only the distinct ones).

The product of its digits is 45360, while the sum is 34.

The square root of 216334375 is about 14708.3097261378. The cubic root of 216334375 is about 600.3094468584.

Adding to 216334375 its reverse (573433612), we get a palindrome (789767987).

The spelling of 216334375 in words is "two hundred sixteen million, three hundred thirty-four thousand, three hundred seventy-five".