13238181 has 48 divisors (see below), whose sum is σ = 22576320. Its totient is φ = 7600320.

The previous prime is 13238177. The next prime is 13238207. The reversal of 13238181 is 18183231.

It is not a de Polignac number, because 13238181 - 2² = 13238177 is a prime.

It is a super-2 number, since 2×13238181² = 350498872377522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

Its product of digits (1152) is a multiple of the sum of its prime divisors (96).

13238181 is a modest number, since divided by 8181 gives 1323 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13238101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 249751 + ... + 249803.

It is an arithmetic number, because the mean of its divisors is an integer number (470340).

Almost surely, 2^13238181 is an apocalyptic number.

13238181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13238181 is a deficient number, since it is larger than the sum of its proper divisors (9338139).

13238181 is a wasteful number, since it uses less digits than its factorization.

13238181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131 (or 96 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 13238181 is about 3638.4311179408. The cubic root of 13238181 is about 236.5607952920.

The spelling of 13238181 in words is "thirteen million, two hundred thirty-eight thousand, one hundred eighty-one".