1566222 has 32 divisors (see below), whose sum is σ = 3628800. Its totient is φ = 441408.

The previous prime is 1566217. The next prime is 1566239. The reversal of 1566222 is 2226651.

It is a junction number, because it is equal to n+sod(n) for n = 1566192 and 1566201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3529 + ... + 3947.

It is an arithmetic number, because the mean of its divisors is an integer number (113400).

2^1566222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1566222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1814400).

1566222 is an abundant number, since it is smaller than the sum of its proper divisors (2062578).

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

1566222 is a wasteful number, since it uses less digits than its factorization.

1566222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520.

The product of its digits is 1440, while the sum is 24.

The square root of 1566222 is about 1251.4879144442. The cubic root of 1566222 is about 116.1317864092.

The spelling of 1566222 in words is "one million, five hundred sixty-six thousand, two hundred twenty-two".