216562 has 16 divisors (see below), whose sum is σ = 352800. Its totient is φ = 99360.

The previous prime is 216553. The next prime is 216569. The reversal of 216562 is 265612.

It is not an unprimeable number, because it can be changed into a prime (216569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1489 + ... + 1627.

It is an arithmetic number, because the mean of its divisors is an integer number (22050).

2²¹⁶⁵⁶² is an apocalyptic number.

216562 is a deficient number, since it is larger than the sum of its proper divisors (136238).

216562 is a wasteful number, since it uses less digits than its factorization.

216562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201.

The product of its digits is 720, while the sum is 22.

The square root of 216562 is about 465.3622245090. The cubic root of 216562 is about 60.0519919713.

It can be divided in two parts, 2 and 16562, that multiplied together give a square (33124 = 182²).

The spelling of 216562 in words is "two hundred sixteen thousand, five hundred sixty-two".