2101305515 has 4 divisors (see below), whose sum is σ = 2521566624. Its totient is φ = 1681044408.

The previous prime is 2101305509. The next prime is 2101305527. The reversal of 2101305515 is 5155031012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2101305515 - 2⁸ = 2101305259 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 210130547 + ... + 210130556.

It is an arithmetic number, because the mean of its divisors is an integer number (630391656).

Almost surely, 2^2101305515 is an apocalyptic number.

2101305515 is a deficient number, since it is larger than the sum of its proper divisors (420261109).

2101305515 is an equidigital number, since it uses as much as digits as its factorization.

2101305515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420261108.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 2101305515 is about 45839.9990728621. Note that the first 3 decimals coincide. The cubic root of 2101305515 is about 1280.8444775251.

Adding to 2101305515 its reverse (5155031012), we get a palindrome (7256336527).

The spelling of 2101305515 in words is "two billion, one hundred one million, three hundred five thousand, five hundred fifteen".