6531223992 has 16 divisors (see below), whose sum is σ = 16328060040. Its totient is φ = 2177074656.

The previous prime is 6531223991. The next prime is 6531224071. The reversal of 6531223992 is 2993221356.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6531223991) 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, 136067143 + ... + 136067190.

Almost surely, 2^6531223992 is an apocalyptic number.

It is an amenable number.

6531223992 is an abundant number, since it is smaller than the sum of its proper divisors (9796836048).

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

6531223992 is a wasteful number, since it uses less digits than its factorization.

6531223992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272134342 (or 272134338 counting only the distinct ones).

The product of its digits is 174960, while the sum is 42.

The square root of 6531223992 is about 80815.9884676293. The cubic root of 6531223992 is about 1869.2391112625.

The spelling of 6531223992 in words is "six billion, five hundred thirty-one million, two hundred twenty-three thousand, nine hundred ninety-two".