1530231887 has 2 divisors, whose sum is σ = 1530231888. Its totient is φ = 1530231886.

The previous prime is 1530231881. The next prime is 1530232001. The reversal of 1530231887 is 7881320351.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (7881320351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1530231887 - 2¹² = 1530227791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1530231887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1530231881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765115943 + 765115944.

It is an arithmetic number, because the mean of its divisors is an integer number (765115944).

Almost surely, 2^1530231887 is an apocalyptic number.

1530231887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1530231887 is an equidigital number, since it uses as much as digits as its factorization.

1530231887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 1530231887 is about 39118.1784724187. The cubic root of 1530231887 is about 1152.3535635818.

The spelling of 1530231887 in words is "one billion, five hundred thirty million, two hundred thirty-one thousand, eight hundred eighty-seven".