21323141 has 8 divisors (see below), whose sum is σ = 24936384. Its totient is φ = 17851680.

The previous prime is 21323129. The next prime is 21323153. The reversal of 21323141 is 14132312.

It is an interprime number because it is at equal distance from previous prime (21323129) and next prime (21323153).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21323141 - 2⁶ = 21323077 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 (21323161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35120 + ... + 35721.

It is an arithmetic number, because the mean of its divisors is an integer number (3117048).

Almost surely, 2^21323141 is an apocalyptic number.

It is an amenable number.

21323141 is a deficient number, since it is larger than the sum of its proper divisors (3613243).

21323141 is an equidigital number, since it uses as much as digits as its factorization.

21323141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70891.

The product of its digits is 144, while the sum is 17.

The square root of 21323141 is about 4617.6986692507. The cubic root of 21323141 is about 277.3003341466.

Adding to 21323141 its reverse (14132312), we get a palindrome (35455453).

It can be divided in two parts, 213231 and 41, that multiplied together give a triangular number (8742471 = T₄₁₈₁).

The spelling of 21323141 in words is "twenty-one million, three hundred twenty-three thousand, one hundred forty-one".