2613445221 has 4 divisors (see below), whose sum is σ = 3484593632. Its totient is φ = 1742296812.

The previous prime is 2613445157. The next prime is 2613445223. The reversal of 2613445221 is 1225443162.

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 2613445221 - 2⁶ = 2613445157 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 (2613445223) 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, 435574201 + ... + 435574206.

It is an arithmetic number, because the mean of its divisors is an integer number (871148408).

Almost surely, 2^2613445221 is an apocalyptic number.

It is an amenable number.

2613445221 is a deficient number, since it is larger than the sum of its proper divisors (871148411).

2613445221 is an equidigital number, since it uses as much as digits as its factorization.

2613445221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871148410.

The product of its digits is 11520, while the sum is 30.

The square root of 2613445221 is about 51121.8663685120. The cubic root of 2613445221 is about 1377.4350628752.

Adding to 2613445221 its reverse (1225443162), we get a palindrome (3838888383).

The spelling of 2613445221 in words is "two billion, six hundred thirteen million, four hundred forty-five thousand, two hundred twenty-one".