149111181 has 6 divisors (see below), whose sum is σ = 215382830. Its totient is φ = 99407448.

The previous prime is 149111177. The next prime is 149111189. The reversal of 149111181 is 181111941.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 79655625 + 69455556 = 8925^2 + 8334^2 .

It is not a de Polignac number, because 149111181 - 2² = 149111177 is a prime.

It is a super-2 number, since 2×149111181² = 44468288598429522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149111189) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8283946 + ... + 8283963.

Almost surely, 2^149111181 is an apocalyptic number.

It is an amenable number.

149111181 is a deficient number, since it is larger than the sum of its proper divisors (66271649).

149111181 is a wasteful number, since it uses less digits than its factorization.

149111181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16567915 (or 16567912 counting only the distinct ones).

The product of its digits is 288, while the sum is 27.

The square root of 149111181 is about 12211.1089177028. The cubic root of 149111181 is about 530.2777480949.

The spelling of 149111181 in words is "one hundred forty-nine million, one hundred eleven thousand, one hundred eighty-one".