105561823 has 8 divisors (see below), whose sum is σ = 112304880. Its totient is φ = 98878080.

The previous prime is 105561821. The next prime is 105561889. The reversal of 105561823 is 328165501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 105561823 - 2¹ = 105561821 is a prime.

It is a super-2 number, since 2×105561823² = 22286596950166658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105561821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11128 + ... + 18301.

It is an arithmetic number, because the mean of its divisors is an integer number (14038110).

Almost surely, 2^105561823 is an apocalyptic number.

105561823 is a deficient number, since it is larger than the sum of its proper divisors (6743057).

105561823 is a wasteful number, since it uses less digits than its factorization.

105561823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29657.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 105561823 is about 10274.3283478775. The cubic root of 105561823 is about 472.6093331531.

The spelling of 105561823 in words is "one hundred five million, five hundred sixty-one thousand, eight hundred twenty-three".