2101671385 has 24 divisors (see below), whose sum is σ = 2775172680. Its totient is φ = 1526807040.

The previous prime is 2101671367. The next prime is 2101671419. The reversal of 2101671385 is 5831761012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16744464 + 2084926921 = 4092^2 + 45661^2 .

It is not a de Polignac number, because 2101671385 - 2¹¹ = 2101669337 is a prime.

It is a super-2 number, since 2×2101671385² = 8834045221055636450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2101671385.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 899679 + ... + 902011.

It is an arithmetic number, because the mean of its divisors is an integer number (115632195).

Almost surely, 2^2101671385 is an apocalyptic number.

It is an amenable number.

2101671385 is a deficient number, since it is larger than the sum of its proper divisors (673501295).

2101671385 is a wasteful number, since it uses less digits than its factorization.

2101671385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3849 (or 3838 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 2101671385 is about 45843.9896278673. The cubic root of 2101671385 is about 1280.9188115316.

The spelling of 2101671385 in words is "two billion, one hundred one million, six hundred seventy-one thousand, three hundred eighty-five".