222161395600 has 45 divisors (see below), whose sum is σ = 533765401777. Its totient is φ = 88860787520.

The previous prime is 222161395583. The next prime is 222161395609. The reversal of 222161395600 is 6593161222.

The square root of 222161395600 is 471340.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 79978102416 + 142183293184 = 282804^2 + 377072^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222161395600.

It is not an unprimeable number, because it can be changed into a prime (222161395609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9415017 + ... + 9438583.

Almost surely, 2^222161395600 is an apocalyptic number.

222161395600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

222161395600 is the 471340-th square number.

It is an amenable number.

222161395600 is an abundant number, since it is smaller than the sum of its proper divisors (311604006177).

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

222161395600 is an frugal number, since it uses more digits than its factorization.

222161395600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47152 (or 23574 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 222161395600 in words is "two hundred twenty-two billion, one hundred sixty-one million, three hundred ninety-five thousand, six hundred".