181236222632181 has 32 divisors (see below), whose sum is σ = 251575213711360. Its totient is φ = 115962485284800.

The previous prime is 181236222632173. The next prime is 181236222632189.

181236222632181 is nontrivially palindromic in base 10.

181236222632181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (181236222632173) and next prime (181236222632189).

It is not a de Polignac number, because 181236222632181 - 2³ = 181236222632173 is a prime.

It is a super-2 number, since 2×181236222632181² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 181236222632181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181236222632189) 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, 3822241 + ... + 19418598.

It is an arithmetic number, because the mean of its divisors is an integer number (7861725428480).

Almost surely, 2^{181236222632181} is an apocalyptic number.

It is an amenable number.

181236222632181 is a deficient number, since it is larger than the sum of its proper divisors (70338991079179).

181236222632181 is a wasteful number, since it uses less digits than its factorization.

181236222632181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23241937.

The product of its digits is 663552, while the sum is 48.

The spelling of 181236222632181 in words is "one hundred eighty-one trillion, two hundred thirty-six billion, two hundred twenty-two million, six hundred thirty-two thousand, one hundred eighty-one".