2105403451 has 4 divisors (see below), whose sum is σ = 2178003600. Its totient is φ = 2032803304.

The previous prime is 2105403449. The next prime is 2105403467. The reversal of 2105403451 is 1543045012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2105403451 - 2¹ = 2105403449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2105403401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36300031 + ... + 36300088.

It is an arithmetic number, because the mean of its divisors is an integer number (544500900).

Almost surely, 2^2105403451 is an apocalyptic number.

2105403451 is a deficient number, since it is larger than the sum of its proper divisors (72600149).

2105403451 is an equidigital number, since it uses as much as digits as its factorization.

2105403451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72600148.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2105403451 is about 45884.6755573143. The cubic root of 2105403451 is about 1281.6765650523.

Adding to 2105403451 its reverse (1543045012), we get a palindrome (3648448463).

The spelling of 2105403451 in words is "two billion, one hundred five million, four hundred three thousand, four hundred fifty-one".