216690202 has 4 divisors (see below), whose sum is σ = 325035306. Its totient is φ = 108345100.

The previous prime is 216690197. The next prime is 216690209. The reversal of 216690202 is 202096612.

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., 126990361 + 89699841 = 11269^2 + 9471^2 .

It is not an unprimeable number, because it can be changed into a prime (216690209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54172549 + ... + 54172552.

Almost surely, 2^216690202 is an apocalyptic number.

216690202 is a deficient number, since it is larger than the sum of its proper divisors (108345104).

216690202 is a wasteful number, since it uses less digits than its factorization.

216690202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108345103.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 216690202 is about 14720.4008776935. The cubic root of 216690202 is about 600.6383964350.

The spelling of 216690202 in words is "two hundred sixteen million, six hundred ninety thousand, two hundred two".