216661202 has 4 divisors (see below), whose sum is σ = 324991806. Its totient is φ = 108330600.

The previous prime is 216661177. The next prime is 216661217. The reversal of 216661202 is 202166612.

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

It can be written as a sum of positive squares in only one way, i.e., 119224561 + 97436641 = 10919^2 + 9871^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54165299 + ... + 54165302.

Almost surely, 2^216661202 is an apocalyptic number.

216661202 is a deficient number, since it is larger than the sum of its proper divisors (108330604).

216661202 is a wasteful number, since it uses less digits than its factorization.

216661202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108330603.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 216661202 is about 14719.4158172123. The cubic root of 216661202 is about 600.6116004371.

The spelling of 216661202 in words is "two hundred sixteen million, six hundred sixty-one thousand, two hundred two".