2105145445 has 16 divisors (see below), whose sum is σ = 2880526320. Its totient is φ = 1463122944.

The previous prime is 2105145443. The next prime is 2105145571. The reversal of 2105145445 is 5445415012.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 342657121 + 1762488324 = 18511^2 + 41982^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105145445 - 2¹ = 2105145443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105145443) 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, 951450 + ... + 953659.

It is an arithmetic number, because the mean of its divisors is an integer number (180032895).

Almost surely, 2^2105145445 is an apocalyptic number.

It is an amenable number.

2105145445 is a deficient number, since it is larger than the sum of its proper divisors (775380875).

2105145445 is a wasteful number, since it uses less digits than its factorization.

2105145445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1905144.

The product of its (nonzero) digits is 16000, while the sum is 31.

The square root of 2105145445 is about 45881.8640096498. The cubic root of 2105145445 is about 1281.6242086972.

The spelling of 2105145445 in words is "two billion, one hundred five million, one hundred forty-five thousand, four hundred forty-five".