22170356 has 12 divisors (see below), whose sum is σ = 41782692. Its totient is φ = 10232448.

The previous prime is 22170353. The next prime is 22170373. The reversal of 22170356 is 65307122.

It can be written as a sum of positive squares in 2 ways, for example, as 12460900 + 9709456 = 3530^2 + 3116^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22170353) 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, 213125 + ... + 213228.

It is an arithmetic number, because the mean of its divisors is an integer number (3481891).

Almost surely, 2^22170356 is an apocalyptic number.

22170356 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

22170356 is a deficient number, since it is larger than the sum of its proper divisors (19612336).

22170356 is a wasteful number, since it uses less digits than its factorization.

22170356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426370 (or 426368 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 22170356 is about 4708.5407505935. The cubic root of 22170356 is about 280.9253230468.

Adding to 22170356 its reverse (65307122), we get a palindrome (87477478).

It can be divided in two parts, 221 and 70356, that multiplied together give a triangular number (15548676 = T₅₅₇₆).

The spelling of 22170356 in words is "twenty-two million, one hundred seventy thousand, three hundred fifty-six".