2541515345 has 4 divisors (see below), whose sum is σ = 3049818420. Its totient is φ = 2033212272.

The previous prime is 2541515299. The next prime is 2541515393. The reversal of 2541515345 is 5435151452.

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 1820216896 + 721298449 = 42664^2 + 26857^2 .

It is a cyclic number.

It is not a de Polignac number, because 2541515345 - 2⁶ = 2541515281 is a prime.

It is an unprimeable number.

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, 254151530 + ... + 254151539.

It is an arithmetic number, because the mean of its divisors is an integer number (762454605).

Almost surely, 2^2541515345 is an apocalyptic number.

It is an amenable number.

2541515345 is a deficient number, since it is larger than the sum of its proper divisors (508303075).

2541515345 is an equidigital number, since it uses as much as digits as its factorization.

2541515345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508303074.

The product of its digits is 60000, while the sum is 35.

The square root of 2541515345 is about 50413.4440898457. Note that the first 3 decimals coincide. The cubic root of 2541515345 is about 1364.6802678879.

Adding to 2541515345 its reverse (5435151452), we get a palindrome (7976666797).

The spelling of 2541515345 in words is "two billion, five hundred forty-one million, five hundred fifteen thousand, three hundred forty-five".