105131515 has 4 divisors (see below), whose sum is σ = 126157824. Its totient is φ = 84105208.

The previous prime is 105131491. The next prime is 105131549. The reversal of 105131515 is 515131501.

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 105131515 - 2¹³ = 105123323 is a prime.

It is a super-2 number, since 2×105131515² = 22105270892390450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10513147 + ... + 10513156.

It is an arithmetic number, because the mean of its divisors is an integer number (31539456).

Almost surely, 2^105131515 is an apocalyptic number.

105131515 is a deficient number, since it is larger than the sum of its proper divisors (21026309).

105131515 is an equidigital number, since it uses as much as digits as its factorization.

105131515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21026308.

The product of its (nonzero) digits is 375, while the sum is 22.

The square root of 105131515 is about 10253.3660326743. The cubic root of 105131515 is about 471.9662833212.

The spelling of 105131515 in words is "one hundred five million, one hundred thirty-one thousand, five hundred fifteen".