13217172 has 12 divisors (see below), whose sum is σ = 30840096. Its totient is φ = 4405720.

The previous prime is 13217167. The next prime is 13217173. The reversal of 13217172 is 27171231.

13217172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13217173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550704 + ... + 550727.

It is an arithmetic number, because the mean of its divisors is an integer number (2570008).

Almost surely, 2^13217172 is an apocalyptic number.

13217172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13217172 is an abundant number, since it is smaller than the sum of its proper divisors (17622924).

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

13217172 is a wasteful number, since it uses less digits than its factorization.

13217172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101438 (or 1101436 counting only the distinct ones).

The product of its digits is 588, while the sum is 24.

The square root of 13217172 is about 3635.5428755552. The cubic root of 13217172 is about 236.4355883332.

The spelling of 13217172 in words is "thirteen million, two hundred seventeen thousand, one hundred seventy-two".