181030332 has 48 divisors (see below), whose sum is σ = 503741952. Its totient is φ = 49473600.

The previous prime is 181030321. The next prime is 181030337. The reversal of 181030332 is 233030181.

It is a happy number.

It is a super-2 number, since 2×181030332² = 65543962208060448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 181030299 and 181030308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181030337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44919 + ... + 48782.

It is an arithmetic number, because the mean of its divisors is an integer number (10494624).

Almost surely, 2^181030332 is an apocalyptic number.

181030332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

181030332 is an abundant number, since it is smaller than the sum of its proper divisors (322711620).

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

181030332 is a wasteful number, since it uses less digits than its factorization.

181030332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93738 (or 93736 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 181030332 is about 13454.7512797524. The cubic root of 181030332 is about 565.6968789009.

The spelling of 181030332 in words is "one hundred eighty-one million, thirty thousand, three hundred thirty-two".