105221545 has 16 divisors (see below), whose sum is σ = 148341312. Its totient is φ = 70637760.

The previous prime is 105221513. The next prime is 105221549. The reversal of 105221545 is 545122501.

It is not a de Polignac number, because 105221545 - 2⁵ = 105221513 is a prime.

It is a super-2 number, since 2×105221545² = 22143147064374050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105221549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72867 + ... + 74296.

It is an arithmetic number, because the mean of its divisors is an integer number (9271332).

Almost surely, 2^105221545 is an apocalyptic number.

It is an amenable number.

105221545 is a deficient number, since it is larger than the sum of its proper divisors (43119767).

105221545 is a wasteful number, since it uses less digits than its factorization.

105221545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147192.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 105221545 is about 10257.7553587517. The cubic root of 105221545 is about 472.1009685964.

The spelling of 105221545 in words is "one hundred five million, two hundred twenty-one thousand, five hundred forty-five".