6331000261 has 2 divisors, whose sum is σ = 6331000262. Its totient is φ = 6331000260.

The previous prime is 6331000253. The next prime is 6331000267. The reversal of 6331000261 is 1620001336.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6148912225 + 182088036 = 78415^2 + 13494^2 .

It is a cyclic number.

It is not a de Polignac number, because 6331000261 - 2³ = 6331000253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6331000267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3165500130 + 3165500131.

It is an arithmetic number, because the mean of its divisors is an integer number (3165500131).

Almost surely, 2^6331000261 is an apocalyptic number.

It is an amenable number.

6331000261 is a deficient number, since it is larger than the sum of its proper divisors (1).

6331000261 is an equidigital number, since it uses as much as digits as its factorization.

6331000261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 6331000261 is about 79567.5829782456. The cubic root of 6331000261 is about 1849.9391517362.

Adding to 6331000261 its reverse (1620001336), we get a palindrome (7951001597).

The spelling of 6331000261 in words is "six billion, three hundred thirty-one million, two hundred sixty-one", and thus it is an aban number.