149988155 has 4 divisors (see below), whose sum is σ = 179985792. Its totient is φ = 119990520.

The previous prime is 149988103. The next prime is 149988191. The reversal of 149988155 is 551889941.

149988155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 149988155 - 2¹² = 149984059 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14998811 + ... + 14998820.

It is an arithmetic number, because the mean of its divisors is an integer number (44996448).

Almost surely, 2^149988155 is an apocalyptic number.

149988155 is a deficient number, since it is larger than the sum of its proper divisors (29997637).

149988155 is an equidigital number, since it uses as much as digits as its factorization.

149988155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29997636.

The product of its digits is 518400, while the sum is 50.

The square root of 149988155 is about 12246.9651342690. The cubic root of 149988155 is about 531.3152984557.

The spelling of 149988155 in words is "one hundred forty-nine million, nine hundred eighty-eight thousand, one hundred fifty-five".