13172551 has 8 divisors (see below), whose sum is σ = 15540224. Its totient is φ = 10926360.

The previous prime is 13172543. The next prime is 13172563. The reversal of 13172551 is 15527131.

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 13172551 - 2³ = 13172543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13172531) 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, 30135 + ... + 30568.

It is an arithmetic number, because the mean of its divisors is an integer number (1942528).

Almost surely, 2^13172551 is an apocalyptic number.

13172551 is a deficient number, since it is larger than the sum of its proper divisors (2367673).

13172551 is an equidigital number, since it uses as much as digits as its factorization.

13172551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60741.

The product of its digits is 1050, while the sum is 25.

The square root of 13172551 is about 3629.4009147516. The cubic root of 13172551 is about 236.1692205374.

Adding to 13172551 its reverse (15527131), we get a palindrome (28699682).

The spelling of 13172551 in words is "thirteen million, one hundred seventy-two thousand, five hundred fifty-one".