2131031387 has 2 divisors, whose sum is σ = 2131031388. Its totient is φ = 2131031386.

The previous prime is 2131031369. The next prime is 2131031411. The reversal of 2131031387 is 7831301312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2131031387 - 2⁶ = 2131031323 is a prime.

It is not a weakly prime, because it can be changed into another prime (2131031327) 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, 1065515693 + 1065515694.

It is an arithmetic number, because the mean of its divisors is an integer number (1065515694).

Almost surely, 2^2131031387 is an apocalyptic number.

2131031387 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131031387 is an equidigital number, since it uses as much as digits as its factorization.

2131031387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 2131031387 is about 46163.0955092918. The cubic root of 2131031387 is about 1286.8559910123.

Adding to 2131031387 its reverse (7831301312), we get a palindrome (9962332699).

The spelling of 2131031387 in words is "two billion, one hundred thirty-one million, thirty-one thousand, three hundred eighty-seven".