3613038221 has 4 divisors (see below), whose sum is σ = 3890964252. Its totient is φ = 3335112192.

The previous prime is 3613038179. The next prime is 3613038241. The reversal of 3613038221 is 1228303163.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1228303163 = 12541 ⋅97943.

It can be written as a sum of positive squares in 2 ways, for example, as 1609132996 + 2003905225 = 40114^2 + 44765^2 .

It is a cyclic number.

It is not a de Polignac number, because 3613038221 - 2¹⁴ = 3613021837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3613038241) 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, 138962996 + ... + 138963021.

It is an arithmetic number, because the mean of its divisors is an integer number (972741063).

Almost surely, 2^3613038221 is an apocalyptic number.

It is an amenable number.

3613038221 is a deficient number, since it is larger than the sum of its proper divisors (277926031).

3613038221 is a wasteful number, since it uses less digits than its factorization.

3613038221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277926030.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 3613038221 is about 60108.5536425557. The cubic root of 3613038221 is about 1534.4668784921.

The spelling of 3613038221 in words is "three billion, six hundred thirteen million, thirty-eight thousand, two hundred twenty-one".