2541440243 has 4 divisors (see below), whose sum is σ = 2577235248. Its totient is φ = 2505645240.

The previous prime is 2541440219. The next prime is 2541440261. The reversal of 2541440243 is 3420441452.

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

It is a cyclic number.

It is not a de Polignac number, because 2541440243 - 2¹² = 2541436147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2541440263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17897396 + ... + 17897537.

It is an arithmetic number, because the mean of its divisors is an integer number (644308812).

Almost surely, 2^2541440243 is an apocalyptic number.

2541440243 is a deficient number, since it is larger than the sum of its proper divisors (35795005).

2541440243 is an equidigital number, since it uses as much as digits as its factorization.

2541440243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35795004.

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 2541440243 is about 50412.6992235091. The cubic root of 2541440243 is about 1364.6668256152. Note that the first 3 decimals are identical.

Adding to 2541440243 its reverse (3420441452), we get a palindrome (5961881695).

The spelling of 2541440243 in words is "two billion, five hundred forty-one million, four hundred forty thousand, two hundred forty-three".