216514655 has 8 divisors (see below), whose sum is σ = 296934432. Its totient is φ = 148467168.

The previous prime is 216514651. The next prime is 216514673. The reversal of 216514655 is 556415612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216514655 - 2² = 216514651 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 6186133 = 216514655 / (2 + 1 + 6 + 5 + 1 + 4 + 6 + 5 + 5).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216514651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3093032 + ... + 3093101.

It is an arithmetic number, because the mean of its divisors is an integer number (37116804).

Almost surely, 2^216514655 is an apocalyptic number.

216514655 is a deficient number, since it is larger than the sum of its proper divisors (80419777).

216514655 is an equidigital number, since it uses as much as digits as its factorization.

216514655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6186145.

The product of its digits is 36000, while the sum is 35.

The square root of 216514655 is about 14714.4369583073. The cubic root of 216514655 is about 600.4761544357.

The spelling of 216514655 in words is "two hundred sixteen million, five hundred fourteen thousand, six hundred fifty-five".