231043312987 has 2 divisors, whose sum is σ = 231043312988. Its totient is φ = 231043312986.

The previous prime is 231043312967. The next prime is 231043313041. The reversal of 231043312987 is 789213340132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231043312987 - 2¹⁵ = 231043280219 is a prime.

It is not a weakly prime, because it can be changed into another prime (231043312967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115521656493 + 115521656494.

It is an arithmetic number, because the mean of its divisors is an integer number (115521656494).

Almost surely, 2^231043312987 is an apocalyptic number.

231043312987 is a deficient number, since it is larger than the sum of its proper divisors (1).

231043312987 is an equidigital number, since it uses as much as digits as its factorization.

231043312987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 231043312987 in words is "two hundred thirty-one billion, forty-three million, three hundred twelve thousand, nine hundred eighty-seven".