172152215 has 8 divisors (see below), whose sum is σ = 210480768. Its totient is φ = 135123040.

The previous prime is 172152203. The next prime is 172152229. The reversal of 172152215 is 512251271.

172152215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-172152215 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324551 + ... + 325080.

It is an arithmetic number, because the mean of its divisors is an integer number (26310096).

Almost surely, 2^172152215 is an apocalyptic number.

172152215 is a deficient number, since it is larger than the sum of its proper divisors (38328553).

172152215 is an equidigital number, since it uses as much as digits as its factorization.

172152215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649689.

The product of its digits is 1400, while the sum is 26.

The square root of 172152215 is about 13120.6789077395. The cubic root of 172152215 is about 556.2937811771.

The spelling of 172152215 in words is "one hundred seventy-two million, one hundred fifty-two thousand, two hundred fifteen".