2105005451 has 2 divisors, whose sum is σ = 2105005452. Its totient is φ = 2105005450.

The previous prime is 2105005447. The next prime is 2105005457. The reversal of 2105005451 is 1545005012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2105005451 - 2² = 2105005447 is a prime.

It is not a weakly prime, because it can be changed into another prime (2105005457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052502725 + 1052502726.

It is an arithmetic number, because the mean of its divisors is an integer number (1052502726).

Almost surely, 2^2105005451 is an apocalyptic number.

2105005451 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105005451 is an equidigital number, since it uses as much as digits as its factorization.

2105005451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 2105005451 is about 45880.3383923876. The cubic root of 2105005451 is about 1281.5957983598.

The spelling of 2105005451 in words is "two billion, one hundred five million, five thousand, four hundred fifty-one".