105540143 has 2 divisors, whose sum is σ = 105540144. Its totient is φ = 105540142.

The previous prime is 105540139. The next prime is 105540173. The reversal of 105540143 is 341045501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 105540143 - 2² = 105540139 is a prime.

It is a super-2 number, since 2×105540143² = 22277443568920898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105540133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52770071 + 52770072.

It is an arithmetic number, because the mean of its divisors is an integer number (52770072).

Almost surely, 2^105540143 is an apocalyptic number.

105540143 is a deficient number, since it is larger than the sum of its proper divisors (1).

105540143 is an equidigital number, since it uses as much as digits as its factorization.

105540143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 105540143 is about 10273.2732368997. The cubic root of 105540143 is about 472.5769765315.

Adding to 105540143 its reverse (341045501), we get a palindrome (446585644).

The spelling of 105540143 in words is "one hundred five million, five hundred forty thousand, one hundred forty-three".