2103506491 has 2 divisors, whose sum is σ = 2103506492. Its totient is φ = 2103506490.

The previous prime is 2103506477. The next prime is 2103506513. The reversal of 2103506491 is 1946053012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2103506491 - 2¹⁷ = 2103375419 is a prime.

It is not a weakly prime, because it can be changed into another prime (2103506191) 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, 1051753245 + 1051753246.

It is an arithmetic number, because the mean of its divisors is an integer number (1051753246).

Almost surely, 2^2103506491 is an apocalyptic number.

2103506491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2103506491 is an equidigital number, since it uses as much as digits as its factorization.

2103506491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 2103506491 is about 45863.9999454910. Note that the first 4 decimals coincide. The cubic root of 2103506491 is about 1281.2915209198.

The spelling of 2103506491 in words is "two billion, one hundred three million, five hundred six thousand, four hundred ninety-one".