181100013 has 4 divisors (see below), whose sum is σ = 241466688. Its totient is φ = 120733340.

The previous prime is 181100011. The next prime is 181100027. The reversal of 181100013 is 310001181.

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 181100013 - 2¹ = 181100011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 181099965 and 181100001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181100011) 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, 30183333 + ... + 30183338.

It is an arithmetic number, because the mean of its divisors is an integer number (60366672).

Almost surely, 2^181100013 is an apocalyptic number.

It is an amenable number.

181100013 is a deficient number, since it is larger than the sum of its proper divisors (60366675).

181100013 is an equidigital number, since it uses as much as digits as its factorization.

181100013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60366674.

The product of its (nonzero) digits is 24, while the sum is 15.

The square root of 181100013 is about 13457.3404876298. The cubic root of 181100013 is about 565.7694510261.

Adding to 181100013 its reverse (310001181), we get a palindrome (491101194).

The spelling of 181100013 in words is "one hundred eighty-one million, one hundred thousand, thirteen".