105538491 has 16 divisors (see below), whose sum is σ = 156643200. Its totient is φ = 70228584.

The previous prime is 105538457. The next prime is 105538507. The reversal of 105538491 is 194835501.

105538491 is a `hidden beast` number, since 10 + 553 + 8 + 4 + 91 = 666.

It is not a de Polignac number, because 105538491 - 2⁹ = 105537979 is a prime.

It is a super-2 number, since 2×105538491² = 22276746165114162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105538441) 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, 12520 + ... + 19178.

It is an arithmetic number, because the mean of its divisors is an integer number (9790200).

Almost surely, 2^105538491 is an apocalyptic number.

105538491 is a deficient number, since it is larger than the sum of its proper divisors (51104709).

105538491 is an equidigital number, since it uses as much as digits as its factorization.

105538491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7255 (or 7249 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 105538491 is about 10273.1928337786. The cubic root of 105538491 is about 472.5745107992.

It can be divided in two parts, 10553 and 8491, that added together give a square (19044 = 138²).

The spelling of 105538491 in words is "one hundred five million, five hundred thirty-eight thousand, four hundred ninety-one".