21480241 has 8 divisors (see below), whose sum is σ = 23340800. Its totient is φ = 19692720.

The previous prime is 21480233. The next prime is 21480247. The reversal of 21480241 is 14208412.

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 21480241 - 2³ = 21480233 is a prime.

It is a super-2 number, since 2×21480241² = 922801506836162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21480247) 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, 17646 + ... + 18823.

It is an arithmetic number, because the mean of its divisors is an integer number (2917600).

Almost surely, 2^21480241 is an apocalyptic number.

It is an amenable number.

21480241 is a deficient number, since it is larger than the sum of its proper divisors (1860559).

21480241 is a wasteful number, since it uses less digits than its factorization.

21480241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36519.

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 21480241 is about 4634.6780902237. The cubic root of 21480241 is about 277.9796795181.

Adding to 21480241 its reverse (14208412), we get a palindrome (35688653).

The spelling of 21480241 in words is "twenty-one million, four hundred eighty thousand, two hundred forty-one".