105215712 has 96 divisors (see below), whose sum is σ = 326592000. Its totient is φ = 29019648.

The previous prime is 105215707. The next prime is 105215713. The reversal of 105215712 is 217512501.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×105215712² = 22140692103333888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105215713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16789 + ... + 22187.

It is an arithmetic number, because the mean of its divisors is an integer number (3402000).

Almost surely, 2^105215712 is an apocalyptic number.

105215712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 105215712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163296000).

105215712 is an abundant number, since it is smaller than the sum of its proper divisors (221376288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

105215712 is a wasteful number, since it uses less digits than its factorization.

105215712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5448 (or 5440 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 24.

The square root of 105215712 is about 10257.4710333493. The cubic root of 105215712 is about 472.0922447308.

The spelling of 105215712 in words is "one hundred five million, two hundred fifteen thousand, seven hundred twelve".