19931222725 has 6 divisors (see below), whose sum is σ = 24714716210. Its totient is φ = 15944978160.

The previous prime is 19931222711. The next prime is 19931222741. The reversal of 19931222725 is 52722213991.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3883907041 + 16047315684 = 62321^2 + 126678^2 .

It is not a de Polignac number, because 19931222725 - 2⁵ = 19931222693 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 398624430 + ... + 398624479.

Almost surely, 2^19931222725 is an apocalyptic number.

It is an amenable number.

19931222725 is a deficient number, since it is larger than the sum of its proper divisors (4783493485).

19931222725 is an equidigital number, since it uses as much as digits as its factorization.

19931222725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797248919 (or 797248914 counting only the distinct ones).

The product of its digits is 136080, while the sum is 43.

The spelling of 19931222725 in words is "nineteen billion, nine hundred thirty-one million, two hundred twenty-two thousand, seven hundred twenty-five".