2105432561 has 8 divisors (see below), whose sum is σ = 2124439680. Its totient is φ = 2086509312.

The previous prime is 2105432519. The next prime is 2105432671. The reversal of 2105432561 is 1652345012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2105432561 - 2²² = 2101238257 is a prime.

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

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2105432501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30020 + ... + 71498.

It is an arithmetic number, because the mean of its divisors is an integer number (265554960).

Almost surely, 2^2105432561 is an apocalyptic number.

It is an amenable number.

2105432561 is a deficient number, since it is larger than the sum of its proper divisors (19007119).

2105432561 is a wasteful number, since it uses less digits than its factorization.

2105432561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41935.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 2105432561 is about 45884.9927645194. The cubic root of 2105432561 is about 1281.6824719856.

Adding to 2105432561 its reverse (1652345012), we get a palindrome (3757777573).

The spelling of 2105432561 in words is "two billion, one hundred five million, four hundred thirty-two thousand, five hundred sixty-one".