13173540 has 96 divisors (see below), whose sum is σ = 39070080. Its totient is φ = 3311616.

The previous prime is 13173539. The next prime is 13173547. The reversal of 13173540 is 4537131.

It is a super-2 number, since 2×13173540² = 347084312263200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13173540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13173547) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116524 + ... + 116636.

It is an arithmetic number, because the mean of its divisors is an integer number (406980).

Almost surely, 2^13173540 is an apocalyptic number.

13173540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13173540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19535040).

13173540 is an abundant number, since it is smaller than the sum of its proper divisors (25896540).

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

13173540 is a wasteful number, since it uses less digits than its factorization.

13173540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 13173540 is about 3629.5371605757. The cubic root of 13173540 is about 236.1751309470.

The spelling of 13173540 in words is "thirteen million, one hundred seventy-three thousand, five hundred forty".