221161088 has 32 divisors (see below), whose sum is σ = 442173060. Its totient is φ = 110184448.

The previous prime is 221161081. The next prime is 221161091. The reversal of 221161088 is 880161122.

221161088 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 165688384 + 55472704 = 12872^2 + 7448^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 221161088.

It is not an unprimeable number, because it can be changed into a prime (221161081) 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, 34556 + ... + 40452.

Almost surely, 2^221161088 is an apocalyptic number.

It is an amenable number.

221161088 is a deficient number, since it is larger than the sum of its proper divisors (221011972).

221161088 is an equidigital number, since it uses as much as digits as its factorization.

221161088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6204 (or 6192 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 221161088 is about 14871.4857361328. The cubic root of 221161088 is about 604.7412212036.

The spelling of 221161088 in words is "two hundred twenty-one million, one hundred sixty-one thousand, eighty-eight".