24704221 has 2 divisors, whose sum is σ = 24704222. Its totient is φ = 24704220.

The previous prime is 24704219. The next prime is 24704233. The reversal of 24704221 is 12240742.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14907321 + 9796900 = 3861^2 + 3130^2 .

It is a cyclic number.

It is not a de Polignac number, because 24704221 - 2¹ = 24704219 is a prime.

It is a super-2 number, since 2×24704221² = 1220597070433682, which contains 22 as substring.

Together with 24704219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 24704192 and 24704201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24704261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12352110 + 12352111.

It is an arithmetic number, because the mean of its divisors is an integer number (12352111).

Almost surely, 2^24704221 is an apocalyptic number.

It is an amenable number.

24704221 is a deficient number, since it is larger than the sum of its proper divisors (1).

24704221 is an equidigital number, since it uses as much as digits as its factorization.

24704221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 24704221 is about 4970.3340933986. The cubic root of 24704221 is about 291.2440452650.

Adding to 24704221 its reverse (12240742), we get a palindrome (36944963).

The spelling of 24704221 in words is "twenty-four million, seven hundred four thousand, two hundred twenty-one".