143221845 has 16 divisors (see below), whose sum is σ = 246782592. Its totient is φ = 70509120.

The previous prime is 143221823. The next prime is 143221849. The reversal of 143221845 is 548122341.

It is not a de Polignac number, because 143221845 - 2⁶ = 143221781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143221849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367041 + ... + 367430.

It is an arithmetic number, because the mean of its divisors is an integer number (15423912).

Almost surely, 2^143221845 is an apocalyptic number.

143221845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

143221845 is a deficient number, since it is larger than the sum of its proper divisors (103560747).

143221845 is a wasteful number, since it uses less digits than its factorization.

143221845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734492.

The product of its digits is 7680, while the sum is 30.

The square root of 143221845 is about 11967.5329537879. The cubic root of 143221845 is about 523.2024327653.

The spelling of 143221845 in words is "one hundred forty-three million, two hundred twenty-one thousand, eight hundred forty-five".