105221436 has 12 divisors (see below), whose sum is σ = 245516712. Its totient is φ = 35073808.

The previous prime is 105221393. The next prime is 105221437. The reversal of 105221436 is 634122501.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×105221436² = 22143101187804192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105221437) 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 3 ways as a sum of consecutive naturals, for example, 4384215 + ... + 4384238.

It is an arithmetic number, because the mean of its divisors is an integer number (20459726).

Almost surely, 2^105221436 is an apocalyptic number.

It is an amenable number.

105221436 is an abundant number, since it is smaller than the sum of its proper divisors (140295276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

105221436 is a wasteful number, since it uses less digits than its factorization.

105221436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8768460 (or 8768458 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 105221436 is about 10257.7500456972. The cubic root of 105221436 is about 472.1008055784.

Adding to 105221436 its reverse (634122501), we get a palindrome (739343937).

The spelling of 105221436 in words is "one hundred five million, two hundred twenty-one thousand, four hundred thirty-six".