172416229 has 4 divisors (see below), whose sum is σ = 174353580. Its totient is φ = 170478880.

The previous prime is 172416221. The next prime is 172416253. The reversal of 172416229 is 922614271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21372129 + 151044100 = 4623^2 + 12290^2 .

It is a cyclic number.

It is not a de Polignac number, because 172416229 - 2³ = 172416221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172416194 and 172416203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172416221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 968542 + ... + 968719.

It is an arithmetic number, because the mean of its divisors is an integer number (43588395).

Almost surely, 2^172416229 is an apocalyptic number.

It is an amenable number.

172416229 is a deficient number, since it is larger than the sum of its proper divisors (1937351).

172416229 is an equidigital number, since it uses as much as digits as its factorization.

172416229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937350.

The product of its digits is 12096, while the sum is 34.

The square root of 172416229 is about 13130.7360418219. The cubic root of 172416229 is about 556.5780147748.

The spelling of 172416229 in words is "one hundred seventy-two million, four hundred sixteen thousand, two hundred twenty-nine".