21230241 has 8 divisors (see below), whose sum is σ = 28337184. Its totient is φ = 14138400.

The previous prime is 21230227. The next prime is 21230243. The reversal of 21230241 is 14203212.

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

It is not a de Polignac number, because 21230241 - 2⁶ = 21230177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21230241.

It is not an unprimeable number, because it can be changed into a prime (21230243) 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, 66 + ... + 6516.

It is an arithmetic number, because the mean of its divisors is an integer number (3542148).

Almost surely, 2^21230241 is an apocalyptic number.

It is an amenable number.

21230241 is a deficient number, since it is larger than the sum of its proper divisors (7106943).

21230241 is a wasteful number, since it uses less digits than its factorization.

21230241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7551.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 21230241 is about 4607.6285657592. The cubic root of 21230241 is about 276.8970367193.

Adding to 21230241 its reverse (14203212), we get a palindrome (35433453).

The spelling of 21230241 in words is "twenty-one million, two hundred thirty thousand, two hundred forty-one".