216741505 has 16 divisors (see below), whose sum is σ = 270305280. Its totient is φ = 166638528.

The previous prime is 216741463. The next prime is 216741529. The reversal of 216741505 is 505147612.

216741505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 216741505 - 2¹³ = 216733313 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28984 + ... + 35686.

It is an arithmetic number, because the mean of its divisors is an integer number (16894080).

Almost surely, 2^216741505 is an apocalyptic number.

It is an amenable number.

216741505 is a deficient number, since it is larger than the sum of its proper divisors (53563775).

216741505 is a wasteful number, since it uses less digits than its factorization.

216741505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6960.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 216741505 is about 14722.1433561829. The cubic root of 216741505 is about 600.6857945481.

The spelling of 216741505 in words is "two hundred sixteen million, seven hundred forty-one thousand, five hundred five".