231880782593 has 2 divisors, whose sum is σ = 231880782594. Its totient is φ = 231880782592.

The previous prime is 231880782589. The next prime is 231880782613. The reversal of 231880782593 is 395287088132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211606440049 + 20274342544 = 460007^2 + 142388^2 .

It is a cyclic number.

It is not a de Polignac number, because 231880782593 - 2² = 231880782589 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (231880782503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115940391296 + 115940391297.

It is an arithmetic number, because the mean of its divisors is an integer number (115940391297).

Almost surely, 2^231880782593 is an apocalyptic number.

It is an amenable number.

231880782593 is a deficient number, since it is larger than the sum of its proper divisors (1).

231880782593 is an equidigital number, since it uses as much as digits as its factorization.

231880782593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 231880782593 in words is "two hundred thirty-one billion, eight hundred eighty million, seven hundred eighty-two thousand, five hundred ninety-three".