172523315 has 8 divisors (see below), whose sum is σ = 208860768. Its totient is φ = 136796800.

The previous prime is 172523303. The next prime is 172523357. The reversal of 172523315 is 513325271.

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

It is not a de Polignac number, because 172523315 - 2¹⁰ = 172522291 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, 152111 + ... + 153240.

It is an arithmetic number, because the mean of its divisors is an integer number (26107596).

Almost surely, 2^172523315 is an apocalyptic number.

172523315 is a deficient number, since it is larger than the sum of its proper divisors (36337453).

172523315 is a wasteful number, since it uses less digits than its factorization.

172523315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305469.

The product of its digits is 6300, while the sum is 29.

The square root of 172523315 is about 13134.8130934551. The cubic root of 172523315 is about 556.6932192784.

Adding to 172523315 its reverse (513325271), we get a palindrome (685848586).

The spelling of 172523315 in words is "one hundred seventy-two million, five hundred twenty-three thousand, three hundred fifteen".