105215373 has 12 divisors (see below), whose sum is σ = 152248668. Its totient is φ = 70018560.

The previous prime is 105215371. The next prime is 105215381. The reversal of 105215373 is 373512501.

105215373 is a `hidden beast` number, since 105 + 21 + 537 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 53978409 + 51236964 = 7347^2 + 7158^2 .

It is not a de Polignac number, because 105215373 - 2¹ = 105215371 is a prime.

It is a super-2 number, since 2×105215373² = 22140549431058258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105215371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4938 + ... + 15323.

It is an arithmetic number, because the mean of its divisors is an integer number (12687389).

Almost surely, 2^105215373 is an apocalyptic number.

It is an amenable number.

105215373 is a deficient number, since it is larger than the sum of its proper divisors (47033295).

105215373 is a wasteful number, since it uses less digits than its factorization.

105215373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20844 (or 20841 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 27.

The square root of 105215373 is about 10257.4545087951. The cubic root of 105215373 is about 472.0917377107.

Adding to 105215373 its reverse (373512501), we get a palindrome (478727874).

The spelling of 105215373 in words is "one hundred five million, two hundred fifteen thousand, three hundred seventy-three".