216435256 has 8 divisors (see below), whose sum is σ = 405816120. Its totient is φ = 108217624.

The previous prime is 216435229. The next prime is 216435257. The reversal of 216435256 is 652534612.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216435257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13527196 + ... + 13527211.

It is an arithmetic number, because the mean of its divisors is an integer number (50727015).

Almost surely, 2^216435256 is an apocalyptic number.

It is an amenable number.

216435256 is a deficient number, since it is larger than the sum of its proper divisors (189380864).

216435256 is a wasteful number, since it uses less digits than its factorization.

216435256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27054413 (or 27054409 counting only the distinct ones).

The product of its digits is 43200, while the sum is 34.

The square root of 216435256 is about 14711.7387143736. The cubic root of 216435256 is about 600.4027444159.

Adding to 216435256 its reverse (652534612), we get a palindrome (868969868).

The spelling of 216435256 in words is "two hundred sixteen million, four hundred thirty-five thousand, two hundred fifty-six".