105656143 has 4 divisors (see below), whose sum is σ = 105760648. Its totient is φ = 105551640.

The previous prime is 105656107. The next prime is 105656147. The reversal of 105656143 is 341656501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 341656501 = 10331 ⋅33071.

It is a cyclic number.

It is not a de Polignac number, because 105656143 - 2¹³ = 105647951 is a prime.

It is a super-2 number, since 2×105656143² = 22326441107272898, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105656147) 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, 50721 + ... + 52762.

It is an arithmetic number, because the mean of its divisors is an integer number (26440162).

Almost surely, 2^105656143 is an apocalyptic number.

105656143 is a deficient number, since it is larger than the sum of its proper divisors (104505).

105656143 is a wasteful number, since it uses less digits than its factorization.

105656143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104504.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 105656143 is about 10278.9174040849. The cubic root of 105656143 is about 472.7500508266.

The spelling of 105656143 in words is "one hundred five million, six hundred fifty-six thousand, one hundred forty-three".