22102146 has 80 divisors (see below), whose sum is σ = 55059840. Its totient is φ = 6570720.

The previous prime is 22102139. The next prime is 22102151. The reversal of 22102146 is 64120122.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 140700 + ... + 140856.

It is an arithmetic number, because the mean of its divisors is an integer number (688248).

Almost surely, 2^22102146 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22102146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27529920).

22102146 is an abundant number, since it is smaller than the sum of its proper divisors (32957694).

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

22102146 is a wasteful number, since it uses less digits than its factorization.

22102146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 22102146 is about 4701.2919500920. The cubic root of 22102146 is about 280.6369259138.

Adding to 22102146 its reverse (64120122), we get a palindrome (86222268).

It can be divided in two parts, 2210 and 2146, that added together give a square (4356 = 66²).

The spelling of 22102146 in words is "twenty-two million, one hundred two thousand, one hundred forty-six".