231551431341149 has 2 divisors, whose sum is σ = 231551431341150. Its totient is φ = 231551431341148.

The previous prime is 231551431341121. The next prime is 231551431341169. The reversal of 231551431341149 is 941143134155132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208961277873049 + 22590153468100 = 14455493^2 + 4752910^2 .

It is a cyclic number.

It is not a de Polignac number, because 231551431341149 - 2³² = 231547136373853 is a prime.

It is a super-2 number, since 2×231551431341149² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231551431341169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115775715670574 + 115775715670575.

It is an arithmetic number, because the mean of its divisors is an integer number (115775715670575).

Almost surely, 2^{231551431341149} is an apocalyptic number.

It is an amenable number.

231551431341149 is a deficient number, since it is larger than the sum of its proper divisors (1).

231551431341149 is an equidigital number, since it uses as much as digits as its factorization.

231551431341149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 47.

The spelling of 231551431341149 in words is "two hundred thirty-one trillion, five hundred fifty-one billion, four hundred thirty-one million, three hundred forty-one thousand, one hundred forty-nine".