21147301 has 8 divisors (see below), whose sum is σ = 24948224. Its totient is φ = 17541360.

The previous prime is 21147289. The next prime is 21147317. The reversal of 21147301 is 10374112.

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

It is a cyclic number.

It is not a de Polignac number, because 21147301 - 2⁹ = 21146789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21147341) 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, 48510 + ... + 48943.

It is an arithmetic number, because the mean of its divisors is an integer number (3118528).

Almost surely, 2^21147301 is an apocalyptic number.

It is an amenable number.

21147301 is a deficient number, since it is larger than the sum of its proper divisors (3800923).

21147301 is an equidigital number, since it uses as much as digits as its factorization.

21147301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97491.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 21147301 is about 4598.6194667530. The cubic root of 21147301 is about 276.5359823767.

The spelling of 21147301 in words is "twenty-one million, one hundred forty-seven thousand, three hundred one".