221475044 has 48 divisors (see below), whose sum is σ = 457043328. Its totient is φ = 91922688.

The previous prime is 221475017. The next prime is 221475097. The reversal of 221475044 is 440574122.

221475044 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221475044² = 98102390229603872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221474998 and 221475016.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 323927 + ... + 324609.

It is an arithmetic number, because the mean of its divisors is an integer number (9521736).

Almost surely, 2^221475044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221475044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228521664).

221475044 is an abundant number, since it is smaller than the sum of its proper divisors (235568284).

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

221475044 is a wasteful number, since it uses less digits than its factorization.

221475044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044 (or 1042 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 29.

The square root of 221475044 is about 14882.0376293033. The cubic root of 221475044 is about 605.0272455458.

The spelling of 221475044 in words is "two hundred twenty-one million, four hundred seventy-five thousand, forty-four".