13172550 has 48 divisors (see below), whose sum is σ = 32957712. Its totient is φ = 3481600.

The previous prime is 13172543. The next prime is 13172563. The reversal of 13172550 is 5527131.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13172550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20230 + ... + 20870.

It is an arithmetic number, because the mean of its divisors is an integer number (686619).

Almost surely, 2^13172550 is an apocalyptic number.

13172550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13172550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16478856).

13172550 is an abundant number, since it is smaller than the sum of its proper divisors (19785162).

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

13172550 is a wasteful number, since it uses less digits than its factorization.

13172550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793 (or 788 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 13172550 is about 3629.4007769878. The cubic root of 13172550 is about 236.1692145611.

Adding to 13172550 its reverse (5527131), we get a palindrome (18699681).

The spelling of 13172550 in words is "thirteen million, one hundred seventy-two thousand, five hundred fifty".