21160143 has 16 divisors (see below), whose sum is σ = 31471200. Its totient is φ = 14051520.

The previous prime is 21160123. The next prime is 21160151. The reversal of 21160143 is 34106112.

It is a happy number.

21160143 is a `hidden beast` number, since 21 + 1 + 601 + 43 = 666.

It is not a de Polignac number, because 21160143 - 2⁶ = 21160079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21160123) 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, 6193 + ... + 8981.

It is an arithmetic number, because the mean of its divisors is an integer number (1966950).

Almost surely, 2^21160143 is an apocalyptic number.

21160143 is a deficient number, since it is larger than the sum of its proper divisors (10311057).

21160143 is a wasteful number, since it uses less digits than its factorization.

21160143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3079 (or 3073 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 21160143 is about 4600.0155434520. The cubic root of 21160143 is about 276.5919478554.

Adding to 21160143 its reverse (34106112), we get a palindrome (55266255).

The spelling of 21160143 in words is "twenty-one million, one hundred sixty thousand, one hundred forty-three".