2086531921 has 2 divisors, whose sum is σ = 2086531922. Its totient is φ = 2086531920.

The previous prime is 2086531903. The next prime is 2086531927. The reversal of 2086531921 is 1291356802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1188870400 + 897661521 = 34480^2 + 29961^2 .

It is a cyclic number.

It is not a de Polignac number, because 2086531921 - 2¹⁹ = 2086007633 is a prime.

It is not a weakly prime, because it can be changed into another prime (2086531927) 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, 1043265960 + 1043265961.

It is an arithmetic number, because the mean of its divisors is an integer number (1043265961).

Almost surely, 2^2086531921 is an apocalyptic number.

It is an amenable number.

2086531921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2086531921 is an equidigital number, since it uses as much as digits as its factorization.

2086531921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 2086531921 is about 45678.5717924718. The cubic root of 2086531921 is about 1277.8356818705.

The spelling of 2086531921 in words is "two billion, eighty-six million, five hundred thirty-one thousand, nine hundred twenty-one".