216105522 has 16 divisors (see below), whose sum is σ = 433857600. Its totient is φ = 71760752.

The previous prime is 216105517. The next prime is 216105583. The reversal of 216105522 is 225501612.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 216105492 and 216105501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66897 + ... + 70052.

It is an arithmetic number, because the mean of its divisors is an integer number (27116100).

Almost surely, 2^216105522 is an apocalyptic number.

216105522 is an abundant number, since it is smaller than the sum of its proper divisors (217752078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216105522 is a wasteful number, since it uses less digits than its factorization.

216105522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137217.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 216105522 is about 14700.5279497030. The cubic root of 216105522 is about 600.0976896492.

The spelling of 216105522 in words is "two hundred sixteen million, one hundred five thousand, five hundred twenty-two".