5613621221 has 8 divisors (see below), whose sum is σ = 6401052504. Its totient is φ = 4876992000.

The previous prime is 5613621199. The next prime is 5613621229. The reversal of 5613621221 is 1221263165.

It can be written as a sum of positive squares in 4 ways, for example, as 1206520225 + 4407100996 = 34735^2 + 66386^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 5613621221 - 2²² = 5609426917 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 (5613621229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12700280 + ... + 12700721.

It is an arithmetic number, because the mean of its divisors is an integer number (800131563).

Almost surely, 2^5613621221 is an apocalyptic number.

It is an amenable number.

5613621221 is a deficient number, since it is larger than the sum of its proper divisors (787431283).

5613621221 is a wasteful number, since it uses less digits than its factorization.

5613621221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25401031.

The product of its digits is 4320, while the sum is 29.

The square root of 5613621221 is about 74924.1030710412. The cubic root of 5613621221 is about 1777.2466396678.

Adding to 5613621221 its reverse (1221263165), we get a palindrome (6834884386).

The spelling of 5613621221 in words is "five billion, six hundred thirteen million, six hundred twenty-one thousand, two hundred twenty-one".