216152505 has 24 divisors (see below), whose sum is σ = 390955968. Its totient is φ = 110268576.

The previous prime is 216152411. The next prime is 216152509. The reversal of 216152505 is 505251612.

216152505 is a `hidden beast` number, since 2 + 1 + 6 + 152 + 505 = 666.

It is not a de Polignac number, because 216152505 - 2⁸ = 216152249 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (216152509) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103387 + ... + 105456.

It is an arithmetic number, because the mean of its divisors is an integer number (16289832).

Almost surely, 2^216152505 is an apocalyptic number.

It is an amenable number.

216152505 is a deficient number, since it is larger than the sum of its proper divisors (174803463).

216152505 is a wasteful number, since it uses less digits than its factorization.

216152505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208877 (or 208874 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 216152505 is about 14702.1258666902. The cubic root of 216152505 is about 600.1411751134.

The spelling of 216152505 in words is "two hundred sixteen million, one hundred fifty-two thousand, five hundred five".