30122181 has 36 divisors (see below), whose sum is σ = 47620612. Its totient is φ = 18330624.

The previous prime is 30122161. The next prime is 30122221. The reversal of 30122181 is 18122103.

It can be written as a sum of positive squares in 6 ways, for example, as 864900 + 29257281 = 930^2 + 5409^2 .

It is not a de Polignac number, because 30122181 - 2⁶ = 30122117 is a prime.

It is a super-2 number, since 2×30122181² = 1814691576393522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30122101) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 96081 + ... + 96393.

Almost surely, 2^30122181 is an apocalyptic number.

It is an amenable number.

30122181 is a deficient number, since it is larger than the sum of its proper divisors (17498431).

30122181 is a wasteful number, since it uses less digits than its factorization.

30122181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390 (or 370 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 30122181 is about 5488.3677901540. The cubic root of 30122181 is about 311.1445067562.

Adding to 30122181 its reverse (18122103), we get a palindrome (48244284).

It can be divided in two parts, 30122 and 181, that added together give a palindrome (30303).

The spelling of 30122181 in words is "thirty million, one hundred twenty-two thousand, one hundred eighty-one".