216462655 has 4 divisors (see below), whose sum is σ = 259755192. Its totient is φ = 173170120.

The previous prime is 216462643. The next prime is 216462721. The reversal of 216462655 is 556264612.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 216462655 - 2⁷ = 216462527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21646261 + ... + 21646270.

It is an arithmetic number, because the mean of its divisors is an integer number (64938798).

Almost surely, 2^216462655 is an apocalyptic number.

216462655 is a deficient number, since it is larger than the sum of its proper divisors (43292537).

216462655 is an equidigital number, since it uses as much as digits as its factorization.

216462655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43292536.

The product of its digits is 86400, while the sum is 37.

The square root of 216462655 is about 14712.6698800728. The cubic root of 216462655 is about 600.4280787676.

The spelling of 216462655 in words is "two hundred sixteen million, four hundred sixty-two thousand, six hundred fifty-five".