30409181 has 12 divisors (see below), whose sum is σ = 33628992. Its totient is φ = 27270000.

The previous prime is 30409163. The next prime is 30409189. The reversal of 30409181 is 18190403.

It is a de Polignac number, because none of the positive numbers 2^k-30409181 is a prime.

It is a super-2 number, since 2×30409181² = 1849436578181522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30409181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30409189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112076 + ... + 112346.

It is an arithmetic number, because the mean of its divisors is an integer number (2802416).

Almost surely, 2^30409181 is an apocalyptic number.

It is an amenable number.

30409181 is a deficient number, since it is larger than the sum of its proper divisors (3219811).

30409181 is a wasteful number, since it uses less digits than its factorization.

30409181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 30409181 is about 5514.4520126664. The cubic root of 30409181 is about 312.1295655441.

Adding to 30409181 its reverse (18190403), we get a palindrome (48599584).

It can be divided in two parts, 3040 and 9181, that added together give a palindrome (12221).

The spelling of 30409181 in words is "thirty million, four hundred nine thousand, one hundred eighty-one".