172136513 has 8 divisors (see below), whose sum is σ = 176238720. Its totient is φ = 168052720.

The previous prime is 172136479. The next prime is 172136533. The reversal of 172136513 is 315631271.

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 172136513 - 2²⁰ = 171087937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172136533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15323 + ... + 24063.

It is an arithmetic number, because the mean of its divisors is an integer number (22029840).

Almost surely, 2^172136513 is an apocalyptic number.

It is an amenable number.

172136513 is a deficient number, since it is larger than the sum of its proper divisors (4102207).

172136513 is an equidigital number, since it uses as much as digits as its factorization.

172136513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9207.

The product of its digits is 3780, while the sum is 29.

The square root of 172136513 is about 13120.0805256675. The cubic root of 172136513 is about 556.2768674814.

Adding to 172136513 its reverse (315631271), we get a palindrome (487767784).

The spelling of 172136513 in words is "one hundred seventy-two million, one hundred thirty-six thousand, five hundred thirteen".