181413232 has 160 divisors (see below), whose sum is σ = 483969024. Its totient is φ = 63590400.

The previous prime is 181413227. The next prime is 181413263. The reversal of 181413232 is 232314181.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 181413197 and 181413206.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 752632 + ... + 752872.

Almost surely, 2^181413232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181413232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241984512).

181413232 is an abundant number, since it is smaller than the sum of its proper divisors (302555792).

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

181413232 is a wasteful number, since it uses less digits than its factorization.

181413232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327 (or 321 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

The square root of 181413232 is about 13468.9729378301. The cubic root of 181413232 is about 566.0954360500.

The spelling of 181413232 in words is "one hundred eighty-one million, four hundred thirteen thousand, two hundred thirty-two".