2541611821 has 8 divisors (see below), whose sum is σ = 2963979200. Its totient is φ = 2178524124.

The previous prime is 2541611797. The next prime is 2541611833. The reversal of 2541611821 is 1281161452.

It is not a de Polignac number, because 2541611821 - 2¹¹ = 2541609773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2541611861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3704631 + ... + 3705316.

It is an arithmetic number, because the mean of its divisors is an integer number (370497400).

Almost surely, 2^2541611821 is an apocalyptic number.

It is an amenable number.

2541611821 is a deficient number, since it is larger than the sum of its proper divisors (422367379).

2541611821 is an frugal number, since it uses more digits than its factorization.

2541611821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7409968 (or 7409954 counting only the distinct ones).

The product of its digits is 3840, while the sum is 31.

The square root of 2541611821 is about 50414.4009287029. The cubic root of 2541611821 is about 1364.6975354376.

The spelling of 2541611821 in words is "two billion, five hundred forty-one million, six hundred eleven thousand, eight hundred twenty-one".