172323163215 has 48 divisors (see below), whose sum is σ = 341446248000. Its totient is φ = 78757318656.

The previous prime is 172323163183. The next prime is 172323163219. The reversal of 172323163215 is 512361323271.

172323163215 is a `hidden beast` number, since 1 + 7 + 2 + 3 + 2 + 3 + 1 + 632 + 15 = 666.

It is not a de Polignac number, because 172323163215 - 2⁵ = 172323163183 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172323163215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172323163219) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1287261 + ... + 1414809.

It is an arithmetic number, because the mean of its divisors is an integer number (7113463500).

Almost surely, 2^172323163215 is an apocalyptic number.

172323163215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

172323163215 is a deficient number, since it is larger than the sum of its proper divisors (169123084785).

172323163215 is a wasteful number, since it uses less digits than its factorization.

172323163215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131856 (or 131853 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

Adding to 172323163215 its reverse (512361323271), we get a palindrome (684684486486).

The spelling of 172323163215 in words is "one hundred seventy-two billion, three hundred twenty-three million, one hundred sixty-three thousand, two hundred fifteen".