172232788225 has 6 divisors (see below), whose sum is σ = 213568657430. Its totient is φ = 137786230560.

The previous prime is 172232788213. The next prime is 172232788291. The reversal of 172232788225 is 522887232271.

It can be written as a sum of positive squares in 3 ways, for example, as 23369542641 + 148863245584 = 152871^2 + 385828^2 .

It is not a de Polignac number, because 172232788225 - 2⁵ = 172232788193 is a prime.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 3444655740 + ... + 3444655789.

Almost surely, 2^172232788225 is an apocalyptic number.

It is an amenable number.

172232788225 is a deficient number, since it is larger than the sum of its proper divisors (41335869205).

172232788225 is an equidigital number, since it uses as much as digits as its factorization.

172232788225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6889311539 (or 6889311534 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 49.

The spelling of 172232788225 in words is "one hundred seventy-two billion, two hundred thirty-two million, seven hundred eighty-eight thousand, two hundred twenty-five".