231543401093 has 2 divisors, whose sum is σ = 231543401094. Its totient is φ = 231543401092.

The previous prime is 231543401041. The next prime is 231543401213. The reversal of 231543401093 is 390104345132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 224484544804 + 7058856289 = 473798^2 + 84017^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231543401093 is a prime.

It is a super-2 number, since 2×231543401093² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231543403093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115771700546 + 115771700547.

It is an arithmetic number, because the mean of its divisors is an integer number (115771700547).

Almost surely, 2^231543401093 is an apocalyptic number.

It is an amenable number.

231543401093 is a deficient number, since it is larger than the sum of its proper divisors (1).

231543401093 is an equidigital number, since it uses as much as digits as its factorization.

231543401093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 231543401093 in words is "two hundred thirty-one billion, five hundred forty-three million, four hundred one thousand, ninety-three".