221160688 has 20 divisors (see below), whose sum is σ = 489713200. Its totient is φ = 94783104.

The previous prime is 221160677. The next prime is 221160689. The reversal of 221160688 is 886061122.

221160688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221160689) 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, 987213 + ... + 987436.

It is an arithmetic number, because the mean of its divisors is an integer number (24485660).

Almost surely, 2^221160688 is an apocalyptic number.

221160688 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

221160688 is an abundant number, since it is smaller than the sum of its proper divisors (268552512).

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

221160688 is a wasteful number, since it uses less digits than its factorization.

221160688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1974664 (or 1974658 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 221160688 is about 14871.4722875713. The cubic root of 221160688 is about 604.7408566178.

The spelling of 221160688 in words is "two hundred twenty-one million, one hundred sixty thousand, six hundred eighty-eight".