181485852 has 12 divisors (see below), whose sum is σ = 423467016. Its totient is φ = 60495280.

The previous prime is 181485809. The next prime is 181485859. The reversal of 181485852 is 258584181.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×181485852² = 65874228952331808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181485859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7561899 + ... + 7561922.

It is an arithmetic number, because the mean of its divisors is an integer number (35288918).

Almost surely, 2^181485852 is an apocalyptic number.

181485852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

181485852 is an abundant number, since it is smaller than the sum of its proper divisors (241981164).

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

181485852 is a wasteful number, since it uses less digits than its factorization.

181485852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15123828 (or 15123826 counting only the distinct ones).

The product of its digits is 102400, while the sum is 42.

The square root of 181485852 is about 13471.6684935460. The cubic root of 181485852 is about 566.1709622687.

The spelling of 181485852 in words is "one hundred eighty-one million, four hundred eighty-five thousand, eight hundred fifty-two".