221040108 has 36 divisors (see below), whose sum is σ = 564509400. Its totient is φ = 72919296.

The previous prime is 221040101. The next prime is 221040121. The reversal of 221040108 is 801040122.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (221040101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28158 + ... + 35141.

Almost surely, 2^221040108 is an apocalyptic number.

It is an amenable number.

221040108 is an abundant number, since it is smaller than the sum of its proper divisors (343469292).

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

221040108 is a wasteful number, since it uses less digits than its factorization.

221040108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63406 (or 63401 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 221040108 is about 14867.4176641406. The cubic root of 221040108 is about 604.6309321560.

The spelling of 221040108 in words is "two hundred twenty-one million, forty thousand, one hundred eight".