24801221 has 2 divisors, whose sum is σ = 24801222. Its totient is φ = 24801220.

The previous prime is 24801173. The next prime is 24801229. The reversal of 24801221 is 12210842.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20349121 + 4452100 = 4511^2 + 2110^2 .

It is a cyclic number.

It is not a de Polignac number, because 24801221 - 2¹⁰ = 24800197 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 24801193 and 24801202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24801229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12400610 + 12400611.

It is an arithmetic number, because the mean of its divisors is an integer number (12400611).

Almost surely, 2^24801221 is an apocalyptic number.

It is an amenable number.

24801221 is a deficient number, since it is larger than the sum of its proper divisors (1).

24801221 is an equidigital number, since it uses as much as digits as its factorization.

24801221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 24801221 is about 4980.0824290367. The cubic root of 24801221 is about 291.6247329464.

The spelling of 24801221 in words is "twenty-four million, eight hundred one thousand, two hundred twenty-one".