2541515421 has 16 divisors (see below), whose sum is σ = 3505057920. Its totient is φ = 1636961280.

The previous prime is 2541515393. The next prime is 2541515423. The reversal of 2541515421 is 1245151452.

It is not a de Polignac number, because 2541515421 - 2³¹ = 394031773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2541515423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87636 + ... + 112973.

It is an arithmetic number, because the mean of its divisors is an integer number (219066120).

Almost surely, 2^2541515421 is an apocalyptic number.

It is an amenable number.

2541515421 is a deficient number, since it is larger than the sum of its proper divisors (963542499).

2541515421 is a wasteful number, since it uses less digits than its factorization.

2541515421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200756.

The product of its digits is 8000, while the sum is 30.

The square root of 2541515421 is about 50413.4448436129. Note that the first 3 decimals coincide. The cubic root of 2541515421 is about 1364.6802814908.

Adding to 2541515421 its reverse (1245151452), we get a palindrome (3786666873).

The spelling of 2541515421 in words is "two billion, five hundred forty-one million, five hundred fifteen thousand, four hundred twenty-one".