5156221361 has 2 divisors, whose sum is σ = 5156221362. Its totient is φ = 5156221360.

The previous prime is 5156221333. The next prime is 5156221417. The reversal of 5156221361 is 1631226515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2819079025 + 2337142336 = 53095^2 + 48344^2 .

It is a cyclic number.

It is not a de Polignac number, because 5156221361 - 2⁶ = 5156221297 is a prime.

It is not a weakly prime, because it can be changed into another prime (5156221331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2578110680 + 2578110681.

It is an arithmetic number, because the mean of its divisors is an integer number (2578110681).

Almost surely, 2^5156221361 is an apocalyptic number.

It is an amenable number.

5156221361 is a deficient number, since it is larger than the sum of its proper divisors (1).

5156221361 is an equidigital number, since it uses as much as digits as its factorization.

5156221361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 32.

The square root of 5156221361 is about 71806.8336650489. The cubic root of 5156221361 is about 1727.6026089900.

Adding to 5156221361 its reverse (1631226515), we get a palindrome (6787447876).

The spelling of 5156221361 in words is "five billion, one hundred fifty-six million, two hundred twenty-one thousand, three hundred sixty-one".