105312155 has 32 divisors (see below), whose sum is σ = 144244800. Its totient is φ = 73170432.

The previous prime is 105312121. The next prime is 105312173. The reversal of 105312155 is 551213501.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 105312155 - 2⁶ = 105312091 is a prime.

It is a super-2 number, since 2×105312155² = 22181299981488050, 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 105312155.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 332057 + ... + 332373.

It is an arithmetic number, because the mean of its divisors is an integer number (4507650).

Almost surely, 2^105312155 is an apocalyptic number.

105312155 is a deficient number, since it is larger than the sum of its proper divisors (38932645).

105312155 is a wasteful number, since it uses less digits than its factorization.

105312155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623.

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

The square root of 105312155 is about 10262.1710665921. The cubic root of 105312155 is about 472.2364440059.

Adding to 105312155 its reverse (551213501), we get a palindrome (656525656).

The spelling of 105312155 in words is "one hundred five million, three hundred twelve thousand, one hundred fifty-five".