30490181 has 4 divisors (see below), whose sum is σ = 30501600. Its totient is φ = 30478764.

The previous prime is 30490151. The next prime is 30490189. The reversal of 30490181 is 18109403.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 30490181 - 2¹⁴ = 30473797 is a prime.

It is a super-2 number, since 2×30490181² = 1859302274825522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30490181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30490189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 680 + ... + 7838.

It is an arithmetic number, because the mean of its divisors is an integer number (7625400).

Almost surely, 2^30490181 is an apocalyptic number.

It is an amenable number.

30490181 is a deficient number, since it is larger than the sum of its proper divisors (11419).

30490181 is an equidigital number, since it uses as much as digits as its factorization.

30490181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11418.

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

The square root of 30490181 is about 5521.7914665442. The cubic root of 30490181 is about 312.4064564815.

Adding to 30490181 its reverse (18109403), we get a palindrome (48599584).

The spelling of 30490181 in words is "thirty million, four hundred ninety thousand, one hundred eighty-one".