221474604 has 48 divisors (see below), whose sum is σ = 563601920. Its totient is φ = 67279680.

The previous prime is 221474557. The next prime is 221474647. The reversal of 221474604 is 406474122.

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, 3339 + ... + 21309.

Almost surely, 2^221474604 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 221474604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281800960).

221474604 is an abundant number, since it is smaller than the sum of its proper divisors (342127316).

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

221474604 is a wasteful number, since it uses less digits than its factorization.

221474604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18070 (or 18068 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 221474604 is about 14882.0228463741. The cubic root of 221474604 is about 605.0268448804.

It can be divided in two parts, 221 and 474604, that added together give a triangular number (474825 = T₉₇₄).

The spelling of 221474604 in words is "two hundred twenty-one million, four hundred seventy-four thousand, six hundred four".