216251606 has 32 divisors (see below), whose sum is σ = 344276352. Its totient is φ = 101744640.

The previous prime is 216251593. The next prime is 216251617. The reversal of 216251606 is 606152612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337046 + ... + 337686.

It is an arithmetic number, because the mean of its divisors is an integer number (10758636).

Almost surely, 2^216251606 is an apocalyptic number.

216251606 is a deficient number, since it is larger than the sum of its proper divisors (128024746).

216251606 is a wasteful number, since it uses less digits than its factorization.

216251606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 216251606 is about 14705.4957753896. The cubic root of 216251606 is about 600.2328781198.

The spelling of 216251606 in words is "two hundred sixteen million, two hundred fifty-one thousand, six hundred six".