725019022221 has 32 divisors (see below), whose sum is σ = 1069143183360. Its totient is φ = 434232959424.

The previous prime is 725019022213. The next prime is 725019022223. The reversal of 725019022221 is 122220910527.

It is not a de Polignac number, because 725019022221 - 2³ = 725019022213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725019022223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 776745 + ... + 1432958.

It is an arithmetic number, because the mean of its divisors is an integer number (33410724480).

Almost surely, 2^725019022221 is an apocalyptic number.

It is an amenable number.

725019022221 is a deficient number, since it is larger than the sum of its proper divisors (344124161139).

725019022221 is a wasteful number, since it uses less digits than its factorization.

725019022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2209945.

The product of its (nonzero) digits is 10080, while the sum is 33.

Adding to 725019022221 its reverse (122220910527), we get a palindrome (847239932748).

The spelling of 725019022221 in words is "seven hundred twenty-five billion, nineteen million, twenty-two thousand, two hundred twenty-one".