181313330 has 32 divisors (see below), whose sum is σ = 376980480. Its totient is φ = 62053120.

The previous prime is 181313329. The next prime is 181313351. The reversal of 181313330 is 33313181.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 181313296 and 181313305.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46610 + ... + 50349.

It is an arithmetic number, because the mean of its divisors is an integer number (11780640).

Almost surely, 2^181313330 is an apocalyptic number.

181313330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

181313330 is an abundant number, since it is smaller than the sum of its proper divisors (195667150).

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

181313330 is a wasteful number, since it uses less digits than its factorization.

181313330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96994.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 181313330 is about 13465.2638295727. The cubic root of 181313330 is about 565.9915030751.

The spelling of 181313330 in words is "one hundred eighty-one million, three hundred thirteen thousand, three hundred thirty".