221125004 has 24 divisors (see below), whose sum is σ = 391020000. Its totient is φ = 109411200.

The previous prime is 221124997. The next prime is 221125007. The reversal of 221125004 is 400521122.

It is not an unprimeable number, because it can be changed into a prime (221125007) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 210272 + ... + 211320.

It is an arithmetic number, because the mean of its divisors is an integer number (16292500).

Almost surely, 2^221125004 is an apocalyptic number.

It is an amenable number.

221125004 is a deficient number, since it is larger than the sum of its proper divisors (169894996).

221125004 is a wasteful number, since it uses less digits than its factorization.

221125004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553 (or 1551 counting only the distinct ones).

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

The square root of 221125004 is about 14870.2724924596. The cubic root of 221125004 is about 604.7083301417.

Adding to 221125004 its reverse (400521122), we get a palindrome (621646126).

The spelling of 221125004 in words is "two hundred twenty-one million, one hundred twenty-five thousand, four".