216690201 has 96 divisors (see below), whose sum is σ = 412917120. Its totient is φ = 111259008.

The previous prime is 216690197. The next prime is 216690209. The reversal of 216690201 is 102096612.

It is not a de Polignac number, because 216690201 - 2² = 216690197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 in 95 ways as a sum of consecutive naturals, for example, 739411 + ... + 739703.

It is an arithmetic number, because the mean of its divisors is an integer number (4301220).

Almost surely, 2^216690201 is an apocalyptic number.

216690201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

216690201 is a deficient number, since it is larger than the sum of its proper divisors (196226919).

216690201 is a wasteful number, since it uses less digits than its factorization.

216690201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 216690201 is about 14720.4008437270. The cubic root of 216690201 is about 600.6383955110.

The spelling of 216690201 in words is "two hundred sixteen million, six hundred ninety thousand, two hundred one".