105631113 has 12 divisors (see below), whose sum is σ = 163836240. Its totient is φ = 60360552.

The previous prime is 105631109. The next prime is 105631117. The reversal of 105631113 is 311136501.

It is an interprime number because it is at equal distance from previous prime (105631109) and next prime (105631117).

It is not a de Polignac number, because 105631113 - 2² = 105631109 is a prime.

It is a super-2 number, since 2×105631113² = 22315864067237538, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 105631113.

It is not an unprimeable number, because it can be changed into a prime (105631117) 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, 359143 + ... + 359436.

It is an arithmetic number, because the mean of its divisors is an integer number (13653020).

Almost surely, 2^105631113 is an apocalyptic number.

It is an amenable number.

105631113 is a deficient number, since it is larger than the sum of its proper divisors (58205127).

105631113 is an equidigital number, since it uses as much as digits as its factorization.

105631113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718596 (or 718589 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 105631113 is about 10277.6997912957. The cubic root of 105631113 is about 472.7127162935.

Adding to 105631113 its reverse (311136501), we get a palindrome (416767614).

The spelling of 105631113 in words is "one hundred five million, six hundred thirty-one thousand, one hundred thirteen".