2541630421 has 16 divisors (see below), whose sum is σ = 2836124928. Its totient is φ = 2257864000.

The previous prime is 2541630409. The next prime is 2541630431. The reversal of 2541630421 is 1240361452.

It is a cyclic number.

It is not a de Polignac number, because 2541630421 - 2¹⁹ = 2541106133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2541630421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2541630401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 358911 + ... + 365923.

It is an arithmetic number, because the mean of its divisors is an integer number (177257808).

Almost surely, 2^2541630421 is an apocalyptic number.

It is an amenable number.

2541630421 is a deficient number, since it is larger than the sum of its proper divisors (294494507).

2541630421 is a wasteful number, since it uses less digits than its factorization.

2541630421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7772.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 2541630421 is about 50414.5853994655. The cubic root of 2541630421 is about 1364.7008644685.

Adding to 2541630421 its reverse (1240361452), we get a palindrome (3781991873).

The spelling of 2541630421 in words is "two billion, five hundred forty-one million, six hundred thirty thousand, four hundred twenty-one".