221725004 has 12 divisors (see below), whose sum is σ = 389970000. Its totient is φ = 110305008.

The previous prime is 221724961. The next prime is 221725013. The reversal of 221725004 is 400527122.

It is a happy number.

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, 138479 + ... + 140070.

It is an arithmetic number, because the mean of its divisors is an integer number (32497500).

Almost surely, 2^221725004 is an apocalyptic number.

It is an amenable number.

221725004 is a deficient number, since it is larger than the sum of its proper divisors (168244996).

221725004 is a wasteful number, since it uses less digits than its factorization.

221725004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278752 (or 278750 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 221725004 is about 14890.4333046423. The cubic root of 221725004 is about 605.2547741930.

The spelling of 221725004 in words is "two hundred twenty-one million, seven hundred twenty-five thousand, four".