105215913 has 36 divisors (see below), whose sum is σ = 169303680. Its totient is φ = 62908560.

The previous prime is 105215909. The next prime is 105215917. The reversal of 105215913 is 319512501.

It is an interprime number because it is at equal distance from previous prime (105215909) and next prime (105215917).

It is not a de Polignac number, because 105215913 - 2² = 105215909 is a prime.

It is a super-2 number, since 2×105215913² = 22140776696847138, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105215917) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 85420 + ... + 86642.

It is an arithmetic number, because the mean of its divisors is an integer number (4702880).

Almost surely, 2^105215913 is an apocalyptic number.

It is an amenable number.

105215913 is a deficient number, since it is larger than the sum of its proper divisors (64087767).

105215913 is a wasteful number, since it uses less digits than its factorization.

105215913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330 (or 1316 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 27.

The square root of 105215913 is about 10257.4808310813. The cubic root of 105215913 is about 472.0925453529.

The spelling of 105215913 in words is "one hundred five million, two hundred fifteen thousand, nine hundred thirteen".