181000212 has 24 divisors (see below), whose sum is σ = 424779936. Its totient is φ = 59983968.

The previous prime is 181000177. The next prime is 181000219. The reversal of 181000212 is 212000181.

It is a super-2 number, since 2×181000212² = 65522153488089888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 181000191 and 181000200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181000219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41518 + ... + 45669.

It is an arithmetic number, because the mean of its divisors is an integer number (17699164).

Almost surely, 2^181000212 is an apocalyptic number.

181000212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

181000212 is an abundant number, since it is smaller than the sum of its proper divisors (243779724).

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

181000212 is a wasteful number, since it uses less digits than its factorization.

181000212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87367 (or 87365 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 181000212 is about 13453.6319259894. The cubic root of 181000212 is about 565.6655034313.

Adding to 181000212 its reverse (212000181), we get a palindrome (393000393).

The spelling of 181000212 in words is "one hundred eighty-one million, two hundred twelve", and thus it is an aban number.