2103458521 has 4 divisors (see below), whose sum is σ = 2103572944. Its totient is φ = 2103344100.

The previous prime is 2103458519. The next prime is 2103458549. The reversal of 2103458521 is 1258543012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2103458521 - 2¹ = 2103458519 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2103458551) 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 in 3 ways as a sum of consecutive naturals, for example, 22695 + ... + 68716.

It is an arithmetic number, because the mean of its divisors is an integer number (525893236).

Almost surely, 2^2103458521 is an apocalyptic number.

It is an amenable number.

2103458521 is a deficient number, since it is larger than the sum of its proper divisors (114423).

2103458521 is an equidigital number, since it uses as much as digits as its factorization.

2103458521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114422.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 2103458521 is about 45863.4769833252. The cubic root of 2103458521 is about 1281.2817809892.

The spelling of 2103458521 in words is "two billion, one hundred three million, four hundred fifty-eight thousand, five hundred twenty-one".