2521440241 has 4 divisors (see below), whose sum is σ = 2522129652. Its totient is φ = 2520750832.

The previous prime is 2521440223. The next prime is 2521440269. The reversal of 2521440241 is 1420441252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 723341025 + 1798099216 = 26895^2 + 42404^2 .

It is a cyclic number.

It is not a de Polignac number, because 2521440241 - 2⁵ = 2521440209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2521440041) 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 in 3 ways as a sum of consecutive naturals, for example, 339190 + ... + 346543.

It is an arithmetic number, because the mean of its divisors is an integer number (630532413).

Almost surely, 2^2521440241 is an apocalyptic number.

It is an amenable number.

2521440241 is a deficient number, since it is larger than the sum of its proper divisors (689411).

2521440241 is an equidigital number, since it uses as much as digits as its factorization.

2521440241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689410.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 2521440241 is about 50213.9446867103. The cubic root of 2521440241 is about 1361.0776207075.

Adding to 2521440241 its reverse (1420441252), we get a palindrome (3941881493).

The spelling of 2521440241 in words is "two billion, five hundred twenty-one million, four hundred forty thousand, two hundred forty-one".