105221543 has 8 divisors (see below), whose sum is σ = 121901088. Its totient is φ = 88953984.

The previous prime is 105221513. The next prime is 105221549. The reversal of 105221543 is 345122501.

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

It is not a de Polignac number, because 105221543 - 2⁸ = 105221287 is a prime.

It is a super-2 number, since 2×105221543² = 22143146222601698, 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 (105221549) 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, 102446 + ... + 103467.

It is an arithmetic number, because the mean of its divisors is an integer number (15237636).

Almost surely, 2^105221543 is an apocalyptic number.

105221543 is a deficient number, since it is larger than the sum of its proper divisors (16679545).

105221543 is an equidigital number, since it uses as much as digits as its factorization.

105221543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205993.

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

The square root of 105221543 is about 10257.7552612645. The cubic root of 105221543 is about 472.1009656052.

The spelling of 105221543 in words is "one hundred five million, two hundred twenty-one thousand, five hundred forty-three".