149213181 has 8 divisors (see below), whose sum is σ = 214254880. Its totient is φ = 91823472.

The previous prime is 149213173. The next prime is 149213191. The reversal of 149213181 is 181312941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 149213181 - 2³ = 149213173 is a prime.

It is a super-2 number, since 2×149213181² = 44529146768277522, 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 (149213111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1912951 + ... + 1913028.

It is an arithmetic number, because the mean of its divisors is an integer number (26781860).

Almost surely, 2^149213181 is an apocalyptic number.

It is an amenable number.

149213181 is a deficient number, since it is larger than the sum of its proper divisors (65041699).

149213181 is a wasteful number, since it uses less digits than its factorization.

149213181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3825995.

The product of its digits is 1728, while the sum is 30.

The square root of 149213181 is about 12215.2847285685. The cubic root of 149213181 is about 530.3986332884.

The spelling of 149213181 in words is "one hundred forty-nine million, two hundred thirteen thousand, one hundred eighty-one".