172513308 has 48 divisors (see below), whose sum is σ = 445165056. Its totient is φ = 51557760.

The previous prime is 172513303. The next prime is 172513349. The reversal of 172513308 is 803315271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172513303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 685 + ... + 18587.

It is an arithmetic number, because the mean of its divisors is an integer number (9274272).

Almost surely, 2^172513308 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172513308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222582528).

172513308 is an abundant number, since it is smaller than the sum of its proper divisors (272651748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172513308 is a wasteful number, since it uses less digits than its factorization.

172513308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17994 (or 17992 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 172513308 is about 13134.4321536943. The cubic root of 172513308 is about 556.6824556380.

Adding to 172513308 its reverse (803315271), we get a palindrome (975828579).

The spelling of 172513308 in words is "one hundred seventy-two million, five hundred thirteen thousand, three hundred eight".