6525218213 has 4 divisors (see below), whose sum is σ = 6701575500. Its totient is φ = 6348860928.

The previous prime is 6525218209. The next prime is 6525218261. The reversal of 6525218213 is 3128125256.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5768858209 + 756360004 = 75953^2 + 27502^2 .

It is a cyclic number.

It is not a de Polignac number, because 6525218213 - 2² = 6525218209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6525218263) 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 in 3 ways as a sum of consecutive naturals, for example, 88178588 + ... + 88178661.

It is an arithmetic number, because the mean of its divisors is an integer number (1675393875).

Almost surely, 2^6525218213 is an apocalyptic number.

It is an amenable number.

6525218213 is a deficient number, since it is larger than the sum of its proper divisors (176357287).

6525218213 is a wasteful number, since it uses less digits than its factorization.

6525218213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176357286.

The product of its digits is 28800, while the sum is 35.

The square root of 6525218213 is about 80778.8228002860. The cubic root of 6525218213 is about 1868.6659833773.

The spelling of 6525218213 in words is "six billion, five hundred twenty-five million, two hundred eighteen thousand, two hundred thirteen".