221040143 has 16 divisors (see below), whose sum is σ = 237940416. Its totient is φ = 204821760.

The previous prime is 221040121. The next prime is 221040179. The reversal of 221040143 is 341040122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221040143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221010143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147305 + ... + 148797.

It is an arithmetic number, because the mean of its divisors is an integer number (14871276).

Almost surely, 2^221040143 is an apocalyptic number.

221040143 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

221040143 is a deficient number, since it is larger than the sum of its proper divisors (16900273).

221040143 is a wasteful number, since it uses less digits than its factorization.

221040143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 221040143 is about 14867.4188412111. The cubic root of 221040143 is about 604.6309640689.

Adding to 221040143 its reverse (341040122), we get a palindrome (562080265).

The spelling of 221040143 in words is "two hundred twenty-one million, forty thousand, one hundred forty-three".