6521223912 has 32 divisors (see below), whose sum is σ = 18632068800. Its totient is φ = 1863206784.

The previous prime is 6521223901. The next prime is 6521223923. The reversal of 6521223912 is 2193221256.

It is an interprime number because it is at equal distance from previous prime (6521223901) and next prime (6521223923).

It is a super-2 number, since 2×6521223912² = 85052722620881167488, which contains 22 as substring.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 19408237 + ... + 19408572.

It is an arithmetic number, because the mean of its divisors is an integer number (582252150).

Almost surely, 2^6521223912 is an apocalyptic number.

It is an amenable number.

6521223912 is an abundant number, since it is smaller than the sum of its proper divisors (12110844888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6521223912 is a wasteful number, since it uses less digits than its factorization.

6521223912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38816825 (or 38816821 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 6521223912 is about 80754.0953264910. The cubic root of 6521223912 is about 1868.2846148840.

The spelling of 6521223912 in words is "six billion, five hundred twenty-one million, two hundred twenty-three thousand, nine hundred twelve".