6921254533 has 2 divisors, whose sum is σ = 6921254534. Its totient is φ = 6921254532.

The previous prime is 6921254531. The next prime is 6921254537. The reversal of 6921254533 is 3354521296.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6551769249 + 369485284 = 80943^2 + 19222^2 .

It is a cyclic number.

It is not a de Polignac number, because 6921254533 - 2¹ = 6921254531 is a prime.

Together with 6921254531, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6921254531) 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, 3460627266 + 3460627267.

It is an arithmetic number, because the mean of its divisors is an integer number (3460627267).

Almost surely, 2^6921254533 is an apocalyptic number.

It is an amenable number.

6921254533 is a deficient number, since it is larger than the sum of its proper divisors (1).

6921254533 is an equidigital number, since it uses as much as digits as its factorization.

6921254533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 40.

The square root of 6921254533 is about 83194.0775115633. The cubic root of 6921254533 is about 1905.7310368881.

The spelling of 6921254533 in words is "six billion, nine hundred twenty-one million, two hundred fifty-four thousand, five hundred thirty-three".