172230747925 has 6 divisors (see below), whose sum is σ = 213566127458. Its totient is φ = 137784598320.

The previous prime is 172230747919. The next prime is 172230747929. The reversal of 172230747925 is 529747032271.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 13008999249 + 159221748676 = 114057^2 + 399026^2 .

It is not a de Polignac number, because 172230747925 - 2⁵ = 172230747893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172230747929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3444614934 + ... + 3444614983.

Almost surely, 2^172230747925 is an apocalyptic number.

It is an amenable number.

172230747925 is a deficient number, since it is larger than the sum of its proper divisors (41335379533).

172230747925 is an equidigital number, since it uses as much as digits as its factorization.

172230747925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6889229927 (or 6889229922 counting only the distinct ones).

The product of its (nonzero) digits is 1481760, while the sum is 49.

The spelling of 172230747925 in words is "one hundred seventy-two billion, two hundred thirty million, seven hundred forty-seven thousand, nine hundred twenty-five".