216061651 has 8 divisors (see below), whose sum is σ = 235297440. Its totient is φ = 197199552.

The previous prime is 216061649. The next prime is 216061751. The reversal of 216061651 is 156160612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216061651 - 2¹ = 216061649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216061151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92215 + ... + 94528.

It is an arithmetic number, because the mean of its divisors is an integer number (29412180).

Almost surely, 2^216061651 is an apocalyptic number.

216061651 is a deficient number, since it is larger than the sum of its proper divisors (19235789).

216061651 is a wasteful number, since it uses less digits than its factorization.

216061651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186845.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 216061651 is about 14699.0357166720. The cubic root of 216061651 is about 600.0570788291.

The spelling of 216061651 in words is "two hundred sixteen million, sixty-one thousand, six hundred fifty-one".