13152181 has 4 divisors (see below), whose sum is σ = 15031072. Its totient is φ = 11273292.

The previous prime is 13152127. The next prime is 13152193. The reversal of 13152181 is 18125131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13152181 - 2⁷ = 13152053 is a prime.

It is a super-2 number, since 2×13152181² = 345959730113522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13153181) 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, 939435 + ... + 939448.

It is an arithmetic number, because the mean of its divisors is an integer number (3757768).

Almost surely, 2^13152181 is an apocalyptic number.

It is an amenable number.

13152181 is a deficient number, since it is larger than the sum of its proper divisors (1878891).

13152181 is an equidigital number, since it uses as much as digits as its factorization.

13152181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878890.

The product of its digits is 240, while the sum is 22.

The square root of 13152181 is about 3626.5935807587. The cubic root of 13152181 is about 236.0474205676.

The spelling of 13152181 in words is "thirteen million, one hundred fifty-two thousand, one hundred eighty-one".