231544333949 has 2 divisors, whose sum is σ = 231544333950. Its totient is φ = 231544333948.

The previous prime is 231544333931. The next prime is 231544334027. The reversal of 231544333949 is 949333445132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135797409049 + 95746924900 = 368507^2 + 309430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231544333949 is a prime.

It is a super-2 number, since 2×231544333949² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231544333897 and 231544333906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231544333649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115772166974 + 115772166975.

It is an arithmetic number, because the mean of its divisors is an integer number (115772166975).

Almost surely, 2^231544333949 is an apocalyptic number.

It is an amenable number.

231544333949 is a deficient number, since it is larger than the sum of its proper divisors (1).

231544333949 is an equidigital number, since it uses as much as digits as its factorization.

231544333949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4199040, while the sum is 50.

The spelling of 231544333949 in words is "two hundred thirty-one billion, five hundred forty-four million, three hundred thirty-three thousand, nine hundred forty-nine".