172215363507 has 24 divisors (see below), whose sum is σ = 252420168000. Its totient is φ = 104361615600.

The previous prime is 172215363499. The next prime is 172215363667. The reversal of 172215363507 is 705363512271.

It is not a de Polignac number, because 172215363507 - 2³ = 172215363499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172215367507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4340244 + ... + 4379742.

It is an arithmetic number, because the mean of its divisors is an integer number (10517507000).

Almost surely, 2^172215363507 is an apocalyptic number.

172215363507 is a deficient number, since it is larger than the sum of its proper divisors (80204804493).

172215363507 is a wasteful number, since it uses less digits than its factorization.

172215363507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51535 (or 51524 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 42.

Adding to 172215363507 its reverse (705363512271), we get a palindrome (877578875778).

The spelling of 172215363507 in words is "one hundred seventy-two billion, two hundred fifteen million, three hundred sixty-three thousand, five hundred seven".