231331429387 has 2 divisors, whose sum is σ = 231331429388. Its totient is φ = 231331429386.

The previous prime is 231331429379. The next prime is 231331429393. The reversal of 231331429387 is 783924133132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231331429387 - 2³ = 231331429379 is a prime.

It is not a weakly prime, because it can be changed into another prime (231331429687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115665714693 + 115665714694.

It is an arithmetic number, because the mean of its divisors is an integer number (115665714694).

Almost surely, 2^231331429387 is an apocalyptic number.

231331429387 is a deficient number, since it is larger than the sum of its proper divisors (1).

231331429387 is an equidigital number, since it uses as much as digits as its factorization.

231331429387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 46.

The spelling of 231331429387 in words is "two hundred thirty-one billion, three hundred thirty-one million, four hundred twenty-nine thousand, three hundred eighty-seven".