231215149 has 6 divisors (see below), whose sum is σ = 254145710. Its totient is φ = 210195480.

The previous prime is 231215129. The next prime is 231215189. The reversal of 231215149 is 941512132.

It can be written as a sum of positive squares in only one way, i.e., 185449924 + 45765225 = 13618^2 + 6765^2 .

It is not a de Polignac number, because 231215149 - 2¹³ = 231206957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231215129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 955314 + ... + 955555.

Almost surely, 2^231215149 is an apocalyptic number.

It is an amenable number.

231215149 is a deficient number, since it is larger than the sum of its proper divisors (22930561).

231215149 is a wasteful number, since it uses less digits than its factorization.

231215149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910891 (or 1910880 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 231215149 is about 15205.7603887474. The cubic root of 231215149 is about 613.7696768634.

The spelling of 231215149 in words is "two hundred thirty-one million, two hundred fifteen thousand, one hundred forty-nine".