5661235271 has 2 divisors, whose sum is σ = 5661235272. Its totient is φ = 5661235270.

The previous prime is 5661235241. The next prime is 5661235273. The reversal of 5661235271 is 1725321665.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5661235271 - 2⁶ = 5661235207 is a prime.

It is a super-2 number, since 2×5661235271² = 64099169587228886882, which contains 22 as substring.

Together with 5661235273, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5661235273) 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, 2830617635 + 2830617636.

It is an arithmetic number, because the mean of its divisors is an integer number (2830617636).

Almost surely, 2^5661235271 is an apocalyptic number.

5661235271 is a deficient number, since it is larger than the sum of its proper divisors (1).

5661235271 is an equidigital number, since it uses as much as digits as its factorization.

5661235271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 38.

The square root of 5661235271 is about 75241.1806858452. The cubic root of 5661235271 is about 1782.2572960212.

The spelling of 5661235271 in words is "five billion, six hundred sixty-one million, two hundred thirty-five thousand, two hundred seventy-one".