6520395213 has 8 divisors (see below), whose sum is σ = 9659844800. Its totient is φ = 4346930124.

The previous prime is 6520395209. The next prime is 6520395239. The reversal of 6520395213 is 3125930256.

6520395213 is a `hidden beast` number, since 6 + 52 + 0 + 395 + 213 = 666.

It is not a de Polignac number, because 6520395213 - 2² = 6520395209 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 (6520395283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120748033 + ... + 120748086.

It is an arithmetic number, because the mean of its divisors is an integer number (1207480600).

Almost surely, 2^6520395213 is an apocalyptic number.

It is an amenable number.

6520395213 is a deficient number, since it is larger than the sum of its proper divisors (3139449587).

6520395213 is a wasteful number, since it uses less digits than its factorization.

6520395213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241496128 (or 241496122 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 6520395213 is about 80748.9641605389. The cubic root of 6520395213 is about 1868.2054727271.

The spelling of 6520395213 in words is "six billion, five hundred twenty million, three hundred ninety-five thousand, two hundred thirteen".