222736566 has 32 divisors (see below), whose sum is σ = 482711040. Its totient is φ = 68109984.

The previous prime is 222736561. The next prime is 222736589. The reversal of 222736566 is 665637222.

It is a happy number.

222736566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×222736566² = 99223155666944712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222736561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3955 + ... + 21473.

It is an arithmetic number, because the mean of its divisors is an integer number (15084720).

Almost surely, 2^222736566 is an apocalyptic number.

222736566 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 222736566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241355520).

222736566 is an abundant number, since it is smaller than the sum of its proper divisors (259974474).

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

222736566 is a wasteful number, since it uses less digits than its factorization.

222736566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17700.

The product of its digits is 181440, while the sum is 39.

The square root of 222736566 is about 14924.3614938797. The cubic root of 222736566 is about 606.1738165367.

The spelling of 222736566 in words is "two hundred twenty-two million, seven hundred thirty-six thousand, five hundred sixty-six".