181320230 has 64 divisors (see below), whose sum is σ = 422876160. Its totient is φ = 54359424.

The previous prime is 181320229. The next prime is 181320241. The reversal of 181320230 is 32023181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12047 + ... + 22533.

It is an arithmetic number, because the mean of its divisors is an integer number (6607440).

Almost surely, 2^181320230 is an apocalyptic number.

181320230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

181320230 is an abundant number, since it is smaller than the sum of its proper divisors (241555930).

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

181320230 is a wasteful number, since it uses less digits than its factorization.

181320230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10533.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 181320230 is about 13465.5200419442. The cubic root of 181320230 is about 565.9986827124.

The spelling of 181320230 in words is "one hundred eighty-one million, three hundred twenty thousand, two hundred thirty".