172315345 has 8 divisors (see below), whose sum is σ = 206907264. Its totient is φ = 137766384.

The previous prime is 172315331. The next prime is 172315369. The reversal of 172315345 is 543513271.

It is a happy number.

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 172315345 - 2⁷ = 172315217 is a prime.

It is a Duffinian 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, 1129 + ... + 18598.

It is an arithmetic number, because the mean of its divisors is an integer number (25863408).

Almost surely, 2^172315345 is an apocalyptic number.

It is an amenable number.

172315345 is a deficient number, since it is larger than the sum of its proper divisors (34591919).

172315345 is a wasteful number, since it uses less digits than its factorization.

172315345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21479.

The product of its digits is 12600, while the sum is 31.

The square root of 172315345 is about 13126.8939585875. The cubic root of 172315345 is about 556.4694388173.

The spelling of 172315345 in words is "one hundred seventy-two million, three hundred fifteen thousand, three hundred forty-five".