172073815 has 8 divisors (see below), whose sum is σ = 210882240. Its totient is φ = 134729952.

The previous prime is 172073789. The next prime is 172073819. The reversal of 172073815 is 518370271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172073815 - 2⁷ = 172073687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172073819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365880 + ... + 366349.

It is an arithmetic number, because the mean of its divisors is an integer number (26360280).

Almost surely, 2^172073815 is an apocalyptic number.

172073815 is a deficient number, since it is larger than the sum of its proper divisors (38808425).

172073815 is an equidigital number, since it uses as much as digits as its factorization.

172073815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732281.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 172073815 is about 13117.6909172308. The cubic root of 172073815 is about 556.2093209321.

The spelling of 172073815 in words is "one hundred seventy-two million, seventy-three thousand, eight hundred fifteen".