5613221261 has 2 divisors, whose sum is σ = 5613221262. Its totient is φ = 5613221260.

The previous prime is 5613221239. The next prime is 5613221267. The reversal of 5613221261 is 1621223165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4721064100 + 892157161 = 68710^2 + 29869^2 .

It is a cyclic number.

It is not a de Polignac number, because 5613221261 - 2¹⁰ = 5613220237 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5613221267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2806610630 + 2806610631.

It is an arithmetic number, because the mean of its divisors is an integer number (2806610631).

Almost surely, 2^5613221261 is an apocalyptic number.

It is an amenable number.

5613221261 is a deficient number, since it is larger than the sum of its proper divisors (1).

5613221261 is an equidigital number, since it uses as much as digits as its factorization.

5613221261 is an evil number, because the sum of its binary digits is even.

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

The square root of 5613221261 is about 74921.4339224764. The cubic root of 5613221261 is about 1777.2044301669.

The spelling of 5613221261 in words is "five billion, six hundred thirteen million, two hundred twenty-one thousand, two hundred sixty-one".