30149181 has 24 divisors (see below), whose sum is σ = 46173920. Its totient is φ = 18903456.

The previous prime is 30149167. The next prime is 30149201. The reversal of 30149181 is 18194103.

It is not a de Polignac number, because 30149181 - 2⁹ = 30148669 is a prime.

It is a super-2 number, since 2×30149181² = 1817946229941522, 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 (30149111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26286 + ... + 27408.

Almost surely, 2^30149181 is an apocalyptic number.

It is an amenable number.

30149181 is a deficient number, since it is larger than the sum of its proper divisors (16024739).

30149181 is a wasteful number, since it uses less digits than its factorization.

30149181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305 (or 1302 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 30149181 is about 5490.8269868937. The cubic root of 30149181 is about 311.2374437282.

The spelling of 30149181 in words is "thirty million, one hundred forty-nine thousand, one hundred eighty-one".