181365430 has 16 divisors (see below), whose sum is σ = 326817504. Its totient is φ = 72466240.

The previous prime is 181365409. The next prime is 181365463. The reversal of 181365430 is 34563181.

It is a junction number, because it is equal to n+sod(n) for n = 181365392 and 181365401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15 + ... + 19045.

It is an arithmetic number, because the mean of its divisors is an integer number (20426094).

Almost surely, 2^181365430 is an apocalyptic number.

181365430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

181365430 is a deficient number, since it is larger than the sum of its proper divisors (145452074).

181365430 is a wasteful number, since it uses less digits than its factorization.

181365430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19991.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 181365430 is about 13467.1982980871. The cubic root of 181365430 is about 566.0457100352.

The spelling of 181365430 in words is "one hundred eighty-one million, three hundred sixty-five thousand, four hundred thirty".