216547655 has 12 divisors (see below), whose sum is σ = 274255992. Its totient is φ = 164118960.

The previous prime is 216547631. The next prime is 216547673. The reversal of 216547655 is 556745612.

It is not a de Polignac number, because 216547655 - 2⁸ = 216547399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58181 + ... + 61790.

It is an arithmetic number, because the mean of its divisors is an integer number (22854666).

Almost surely, 2^216547655 is an apocalyptic number.

216547655 is a deficient number, since it is larger than the sum of its proper divisors (57708337).

216547655 is a wasteful number, since it uses less digits than its factorization.

216547655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120014 (or 119995 counting only the distinct ones).

The product of its digits is 252000, while the sum is 41.

The square root of 216547655 is about 14715.5582632804. The cubic root of 216547655 is about 600.5066600019.

The spelling of 216547655 in words is "two hundred sixteen million, five hundred forty-seven thousand, six hundred fifty-five".