181409530 has 32 divisors (see below), whose sum is σ = 345772800. Its totient is φ = 68334912.

The previous prime is 181409507. The next prime is 181409537. The reversal of 181409530 is 35904181.

181409530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 181409492 and 181409501.

It is not an unprimeable number, because it can be changed into a prime (181409537) 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, 30111 + ... + 35629.

It is an arithmetic number, because the mean of its divisors is an integer number (10805400).

Almost surely, 2^181409530 is an apocalyptic number.

181409530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

181409530 is a deficient number, since it is larger than the sum of its proper divisors (164363270).

181409530 is a wasteful number, since it uses less digits than its factorization.

181409530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5718.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 181409530 is about 13468.8355101694. The cubic root of 181409530 is about 566.0915853578.

The spelling of 181409530 in words is "one hundred eighty-one million, four hundred nine thousand, five hundred thirty".