105618631 has 4 divisors (see below), whose sum is σ = 105644152. Its totient is φ = 105593112.

The previous prime is 105618613. The next prime is 105618679. The reversal of 105618631 is 136816501.

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 105618631 - 2⁷ = 105618503 is a prime.

It is a super-2 number, since 2×105618631² = 22310590428628322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 105618593 and 105618602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105612631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4965 + ... + 15358.

It is an arithmetic number, because the mean of its divisors is an integer number (26411038).

Almost surely, 2^105618631 is an apocalyptic number.

105618631 is a deficient number, since it is larger than the sum of its proper divisors (25521).

105618631 is an equidigital number, since it uses as much as digits as its factorization.

105618631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25520.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 105618631 is about 10277.0925363159. The cubic root of 105618631 is about 472.6940960456.

The spelling of 105618631 in words is "one hundred five million, six hundred eighteen thousand, six hundred thirty-one".