2031538891 has 2 divisors, whose sum is σ = 2031538892. Its totient is φ = 2031538890.

The previous prime is 2031538877. The next prime is 2031538933. The reversal of 2031538891 is 1988351302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2031538891 - 2¹⁹ = 2031014603 is a prime.

It is not a weakly prime, because it can be changed into another prime (2031538291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015769445 + 1015769446.

It is an arithmetic number, because the mean of its divisors is an integer number (1015769446).

Almost surely, 2^2031538891 is an apocalyptic number.

2031538891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031538891 is an equidigital number, since it uses as much as digits as its factorization.

2031538891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 2031538891 is about 45072.5957872408. The cubic root of 2031538891 is about 1266.5092914436.

The spelling of 2031538891 in words is "two billion, thirty-one million, five hundred thirty-eight thousand, eight hundred ninety-one".