216341990 has 32 divisors (see below), whose sum is σ = 400661856. Its totient is φ = 84072960.

The previous prime is 216341977. The next prime is 216342011. The reversal of 216341990 is 99143612.

It is a self number, because there is not a number n which added to its sum of digits gives 216341990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48494 + ... + 52766.

It is an arithmetic number, because the mean of its divisors is an integer number (12520683).

Almost surely, 2^216341990 is an apocalyptic number.

216341990 is a deficient number, since it is larger than the sum of its proper divisors (184319866).

216341990 is a wasteful number, since it uses less digits than its factorization.

216341990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4424.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 216341990 is about 14708.5685911308. The cubic root of 216341990 is about 600.3164904344.

The spelling of 216341990 in words is "two hundred sixteen million, three hundred forty-one thousand, nine hundred ninety".