221163892 has 12 divisors (see below), whose sum is σ = 389275236. Its totient is φ = 109942400.

The previous prime is 221163871. The next prime is 221163893. The reversal of 221163892 is 298361122.

It can be written as a sum of positive squares in 2 ways, for example, as 124456336 + 96707556 = 11156^2 + 9834^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221163893) 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, 159109 + ... + 160492.

It is an arithmetic number, because the mean of its divisors is an integer number (32439603).

Almost surely, 2^221163892 is an apocalyptic number.

It is an amenable number.

221163892 is a deficient number, since it is larger than the sum of its proper divisors (168111344).

221163892 is a wasteful number, since it uses less digits than its factorization.

221163892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319778 (or 319776 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 221163892 is about 14871.5800102074. The cubic root of 221163892 is about 604.7437769384.

The spelling of 221163892 in words is "two hundred twenty-one million, one hundred sixty-three thousand, eight hundred ninety-two".