30140181 has 20 divisors (see below), whose sum is σ = 45245772. Its totient is φ = 19994688.

The previous prime is 30140179. The next prime is 30140191. The reversal of 30140181 is 18104103.

It can be written as a sum of positive squares in 2 ways, for example, as 6081156 + 24059025 = 2466^2 + 4905^2 .

It is not a de Polignac number, because 30140181 - 2¹ = 30140179 is a prime.

It is a super-2 number, since 2×30140181² = 1816861021425522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30140101) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18075 + ... + 19671.

Almost surely, 2^30140181 is an apocalyptic number.

It is an amenable number.

30140181 is a deficient number, since it is larger than the sum of its proper divisors (15105591).

30140181 is a wasteful number, since it uses less digits than its factorization.

30140181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842 (or 1833 counting only the distinct ones).

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

The square root of 30140181 is about 5490.0073770442. The cubic root of 30140181 is about 311.2064709049.

Adding to 30140181 its reverse (18104103), we get a palindrome (48244284).

It can be divided in two parts, 301401 and 81, that multiplied together give a square (24413481 = 4941²).

The spelling of 30140181 in words is "thirty million, one hundred forty thousand, one hundred eighty-one".