216101684 has 6 divisors (see below), whose sum is σ = 378177954. Its totient is φ = 108050840.

The previous prime is 216101657. The next prime is 216101689. The reversal of 216101684 is 486101612.

216101684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 195216784 + 20884900 = 13972^2 + 4570^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216101689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27012707 + ... + 27012714.

It is an arithmetic number, because the mean of its divisors is an integer number (63029659).

Almost surely, 2^216101684 is an apocalyptic number.

It is an amenable number.

216101684 is a deficient number, since it is larger than the sum of its proper divisors (162076270).

216101684 is a wasteful number, since it uses less digits than its factorization.

216101684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54025425 (or 54025423 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 216101684 is about 14700.3974095941. The cubic root of 216101684 is about 600.0941370814.

Subtracting from 216101684 its sum of digits (29), we obtain a triangular number (216101655 = T₂₀₇₈₉).

The spelling of 216101684 in words is "two hundred sixteen million, one hundred one thousand, six hundred eighty-four".