149331 has 16 divisors (see below), whose sum is σ = 245504. Its totient is φ = 78624.

The previous prime is 149323. The next prime is 149333. The reversal of 149331 is 133941.

149331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

149331 is a nontrivial binomial coefficient, being equal to C(547, 2).

It is not a de Polignac number, because 149331 - 2³ = 149323 is a prime.

It is a super-2 number, since 2×149331² = 44599495122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 149298 and 149307.

It is not an unprimeable number, because it can be changed into a prime (149333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1 + ... + 546.

It is an arithmetic number, because the mean of its divisors is an integer number (15344).

2¹⁴⁹³³¹ is an apocalyptic number.

149331 is the 546-th triangular number.

149331 is a deficient number, since it is larger than the sum of its proper divisors (96173).

149331 is a wasteful number, since it uses less digits than its factorization.

149331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570.

The product of its digits is 324, while the sum is 21.

The square root of 149331 is about 386.4336941831. The cubic root of 149331 is about 53.0538197804.

The spelling of 149331 in words is "one hundred forty-nine thousand, three hundred thirty-one".