2440542521 has 2 divisors, whose sum is σ = 2440542522. Its totient is φ = 2440542520.

The previous prime is 2440542499. The next prime is 2440542557. The reversal of 2440542521 is 1252450442.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1886599225 + 553943296 = 43435^2 + 23536^2 .

It is a cyclic number.

It is not a de Polignac number, because 2440542521 - 2¹⁸ = 2440280377 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2440542721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1220271260 + 1220271261.

It is an arithmetic number, because the mean of its divisors is an integer number (1220271261).

Almost surely, 2^2440542521 is an apocalyptic number.

It is an amenable number.

2440542521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2440542521 is an equidigital number, since it uses as much as digits as its factorization.

2440542521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12800, while the sum is 29.

The square root of 2440542521 is about 49401.8473440012. The cubic root of 2440542521 is about 1346.3628702014.

Adding to 2440542521 its reverse (1252450442), we get a palindrome (3692992963).

The spelling of 2440542521 in words is "two billion, four hundred forty million, five hundred forty-two thousand, five hundred twenty-one".