2524401221 has 2 divisors, whose sum is σ = 2524401222. Its totient is φ = 2524401220.

The previous prime is 2524401181. The next prime is 2524401241. The reversal of 2524401221 is 1221044252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2341204996 + 183196225 = 48386^2 + 13535^2 .

It is a cyclic number.

It is not a de Polignac number, because 2524401221 - 2¹⁸ = 2524139077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2524401241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1262200610 + 1262200611.

It is an arithmetic number, because the mean of its divisors is an integer number (1262200611).

Almost surely, 2^2524401221 is an apocalyptic number.

It is an amenable number.

2524401221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2524401221 is an equidigital number, since it uses as much as digits as its factorization.

2524401221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 2524401221 is about 50243.4196786007. The cubic root of 2524401221 is about 1361.6101929286.

Adding to 2524401221 its reverse (1221044252), we get a palindrome (3745445473).

The spelling of 2524401221 in words is "two billion, five hundred twenty-four million, four hundred one thousand, two hundred twenty-one".