105115287 has 16 divisors (see below), whose sum is σ = 142829568. Its totient is φ = 68748960.

The previous prime is 105115279. The next prime is 105115321. The reversal of 105115287 is 782511501.

It is not a de Polignac number, because 105115287 - 2³ = 105115279 is a prime.

It is a super-2 number, since 2×105115287² = 22098447122184738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105115237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46393 + ... + 48605.

It is an arithmetic number, because the mean of its divisors is an integer number (8926848).

Almost surely, 2^105115287 is an apocalyptic number.

105115287 is a deficient number, since it is larger than the sum of its proper divisors (37714281).

105115287 is a wasteful number, since it uses less digits than its factorization.

105115287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510.

The product of its (nonzero) digits is 2800, while the sum is 30.

The square root of 105115287 is about 10252.5746522520. The cubic root of 105115287 is about 471.9419979838.

Adding to 105115287 its reverse (782511501), we get a palindrome (887626788).

The spelling of 105115287 in words is "one hundred five million, one hundred fifteen thousand, two hundred eighty-seven".