2541531621 has 8 divisors (see below), whose sum is σ = 3498022144. Its totient is φ = 1639697760.

The previous prime is 2541531617. The next prime is 2541531647. The reversal of 2541531621 is 1261351452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2541531621 - 2² = 2541531617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2541531611) 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 7 ways as a sum of consecutive naturals, for example, 13664056 + ... + 13664241.

It is an arithmetic number, because the mean of its divisors is an integer number (437252768).

Almost surely, 2^2541531621 is an apocalyptic number.

It is an amenable number.

2541531621 is a deficient number, since it is larger than the sum of its proper divisors (956490523).

2541531621 is a wasteful number, since it uses less digits than its factorization.

2541531621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27328331.

The product of its digits is 7200, while the sum is 30.

The square root of 2541531621 is about 50413.6055147814. The cubic root of 2541531621 is about 1364.6831810435.

The spelling of 2541531621 in words is "two billion, five hundred forty-one million, five hundred thirty-one thousand, six hundred twenty-one".