2105665562 has 32 divisors (see below), whose sum is σ = 4240785024. Its totient is φ = 757281600.

The previous prime is 2105665561. The next prime is 2105665589. The reversal of 2105665562 is 2655665012.

It is a happy number.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2105665561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 523889 + ... + 527892.

It is an arithmetic number, because the mean of its divisors is an integer number (132524532).

Almost surely, 2^2105665562 is an apocalyptic number.

2105665562 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2105665562 is an abundant number, since it is smaller than the sum of its proper divisors (2135119462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2105665562 is a wasteful number, since it uses less digits than its factorization.

2105665562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051814.

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 2105665562 is about 45887.5316616616. The cubic root of 2105665562 is about 1281.7297500426.

The spelling of 2105665562 in words is "two billion, one hundred five million, six hundred sixty-five thousand, five hundred sixty-two".