216149145 has 16 divisors (see below), whose sum is σ = 346057920. Its totient is φ = 115206464.

The previous prime is 216149137. The next prime is 216149179. The reversal of 216149145 is 541941612.

It is a cyclic number.

It is not a de Polignac number, because 216149145 - 2³ = 216149137 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 26851 + ... + 33959.

It is an arithmetic number, because the mean of its divisors is an integer number (21628620).

Almost surely, 2^216149145 is an apocalyptic number.

It is an amenable number.

216149145 is a deficient number, since it is larger than the sum of its proper divisors (129908775).

216149145 is a wasteful number, since it uses less digits than its factorization.

216149145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9144.

The product of its digits is 8640, while the sum is 33.

The square root of 216149145 is about 14702.0115970571. The cubic root of 216149145 is about 600.1380654497.

The spelling of 216149145 in words is "two hundred sixteen million, one hundred forty-nine thousand, one hundred forty-five".