216355101 has 4 divisors (see below), whose sum is σ = 288473472. Its totient is φ = 144236732.

The previous prime is 216355091. The next prime is 216355103. The reversal of 216355101 is 101553612.

216355101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216355101 - 2⁶ = 216355037 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216355103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36059181 + ... + 36059186.

It is an arithmetic number, because the mean of its divisors is an integer number (72118368).

Almost surely, 2^216355101 is an apocalyptic number.

It is an amenable number.

216355101 is a deficient number, since it is larger than the sum of its proper divisors (72118371).

216355101 is an equidigital number, since it uses as much as digits as its factorization.

216355101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72118370.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 216355101 is about 14709.0142769664. The cubic root of 216355101 is about 600.3286172072.

The spelling of 216355101 in words is "two hundred sixteen million, three hundred fifty-five thousand, one hundred one".