6512881 has 4 divisors (see below), whose sum is σ = 6518512. Its totient is φ = 6507252.

The previous prime is 6512879. The next prime is 6512899. The reversal of 6512881 is 1882156.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6512881 - 2¹ = 6512879 is a prime.

It is a super-2 number, since 2×6512881² = 84835237840322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6512861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375 + ... + 3628.

It is an arithmetic number, because the mean of its divisors is an integer number (1629628).

Almost surely, 2^6512881 is an apocalyptic number.

It is an amenable number.

6512881 is a deficient number, since it is larger than the sum of its proper divisors (5631).

6512881 is a wasteful number, since it uses less digits than its factorization.

6512881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5630.

The product of its digits is 3840, while the sum is 31.

The square root of 6512881 is about 2552.0346784478. The cubic root of 6512881 is about 186.7487546414.

The spelling of 6512881 in words is "six million, five hundred twelve thousand, eight hundred eighty-one".