221545330 has 8 divisors (see below), whose sum is σ = 398781612. Its totient is φ = 88618128.

The previous prime is 221545327. The next prime is 221545367. The reversal of 221545330 is 33545122.

221545330 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 219899241 + 1646089 = 14829^2 + 1283^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 221545295 and 221545304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11077257 + ... + 11077276.

Almost surely, 2^221545330 is an apocalyptic number.

221545330 is a deficient number, since it is larger than the sum of its proper divisors (177236282).

221545330 is a wasteful number, since it uses less digits than its factorization.

221545330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22154540.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 221545330 is about 14884.3988793636. The cubic root of 221545330 is about 605.0912413901.

The spelling of 221545330 in words is "two hundred twenty-one million, five hundred forty-five thousand, three hundred thirty".