105639051 has 12 divisors (see below), whose sum is σ = 163848552. Its totient is φ = 60365088.

The previous prime is 105639047. The next prime is 105639077. The reversal of 105639051 is 150936501.

It is not a de Polignac number, because 105639051 - 2² = 105639047 is a prime.

It is a super-2 number, since 2×105639051² = 22319218192361202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105639011) 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, 359170 + ... + 359463.

It is an arithmetic number, because the mean of its divisors is an integer number (13654046).

Almost surely, 2^105639051 is an apocalyptic number.

105639051 is a deficient number, since it is larger than the sum of its proper divisors (58209501).

105639051 is an equidigital number, since it uses as much as digits as its factorization.

105639051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718650 (or 718643 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 105639051 is about 10278.0859599441. The cubic root of 105639051 is about 472.7245571847.

It can be divided in two parts, 10563905 and 1, that added together give a triangular number (10563906 = T₄₅₉₆).

The spelling of 105639051 in words is "one hundred five million, six hundred thirty-nine thousand, fifty-one".