221152004 has 12 divisors (see below), whose sum is σ = 387212700. Its totient is φ = 110519808.

The previous prime is 221151977. The next prime is 221152013. The reversal of 221152004 is 400251122.

221152004 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 45589504 + 175562500 = 6752^2 + 13250^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4469 + ... + 21500.

It is an arithmetic number, because the mean of its divisors is an integer number (32267725).

Almost surely, 2^221152004 is an apocalyptic number.

It is an amenable number.

221152004 is a deficient number, since it is larger than the sum of its proper divisors (166060696).

221152004 is a wasteful number, since it uses less digits than its factorization.

221152004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28102 (or 28100 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 221152004 is about 14871.1803163031. The cubic root of 221152004 is about 604.7329413498.

The spelling of 221152004 in words is "two hundred twenty-one million, one hundred fifty-two thousand, four".