6481522571 has 4 divisors (see below), whose sum is σ = 6482553000. Its totient is φ = 6480492144.

The previous prime is 6481522559. The next prime is 6481522589. The reversal of 6481522571 is 1752251846.

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

It is a cyclic number.

It is not a de Polignac number, because 6481522571 - 2²² = 6477328267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6481522171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505721 + ... + 518378.

It is an arithmetic number, because the mean of its divisors is an integer number (1620638250).

Almost surely, 2^6481522571 is an apocalyptic number.

6481522571 is a deficient number, since it is larger than the sum of its proper divisors (1030429).

6481522571 is a wasteful number, since it uses less digits than its factorization.

6481522571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030428.

The product of its digits is 134400, while the sum is 41.

The square root of 6481522571 is about 80507.9037796911. The cubic root of 6481522571 is about 1864.4855101036.

The spelling of 6481522571 in words is "six billion, four hundred eighty-one million, five hundred twenty-two thousand, five hundred seventy-one".