725201221 has 8 divisors (see below), whose sum is σ = 746514560. Its totient is φ = 703978128.

The previous prime is 725201219. The next prime is 725201227. The reversal of 725201221 is 122102527.

725201221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 725201221 - 2¹ = 725201219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 725201192 and 725201201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725201227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6081 + ... + 38566.

It is an arithmetic number, because the mean of its divisors is an integer number (93314320).

Almost surely, 2^725201221 is an apocalyptic number.

It is an amenable number.

725201221 is a deficient number, since it is larger than the sum of its proper divisors (21313339).

725201221 is a wasteful number, since it uses less digits than its factorization.

725201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45123.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 725201221 is about 26929.5603566044. The cubic root of 725201221 is about 898.4339931776.

Adding to 725201221 its reverse (122102527), we get a palindrome (847303748).

The spelling of 725201221 in words is "seven hundred twenty-five million, two hundred one thousand, two hundred twenty-one".