2541031221 has 4 divisors (see below), whose sum is σ = 3388041632. Its totient is φ = 1694020812.

The previous prime is 2541031183. The next prime is 2541031223. The reversal of 2541031221 is 1221301452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2541031221 - 2²⁵ = 2507476789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2541031223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423505201 + ... + 423505206.

It is an arithmetic number, because the mean of its divisors is an integer number (847010408).

Almost surely, 2^2541031221 is an apocalyptic number.

It is an amenable number.

2541031221 is a deficient number, since it is larger than the sum of its proper divisors (847010411).

2541031221 is an equidigital number, since it uses as much as digits as its factorization.

2541031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847010410.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 2541031221 is about 50408.6423245062. The cubic root of 2541031221 is about 1364.5936113944.

Adding to 2541031221 its reverse (1221301452), we get a palindrome (3762332673).

The spelling of 2541031221 in words is "two billion, five hundred forty-one million, thirty-one thousand, two hundred twenty-one".