231312213149 has 2 divisors, whose sum is σ = 231312213150. Its totient is φ = 231312213148.

The previous prime is 231312213131. The next prime is 231312213157. The reversal of 231312213149 is 941312213132.

231312213149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229136457124 + 2175756025 = 478682^2 + 46645^2 .

It is a cyclic number.

It is not a de Polignac number, because 231312213149 - 2¹⁶ = 231312147613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231312213199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115656106574 + 115656106575.

It is an arithmetic number, because the mean of its divisors is an integer number (115656106575).

Almost surely, 2^231312213149 is an apocalyptic number.

It is an amenable number.

231312213149 is a deficient number, since it is larger than the sum of its proper divisors (1).

231312213149 is an equidigital number, since it uses as much as digits as its factorization.

231312213149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The spelling of 231312213149 in words is "two hundred thirty-one billion, three hundred twelve million, two hundred thirteen thousand, one hundred forty-nine".