6531172006 has 4 divisors (see below), whose sum is σ = 9796758012. Its totient is φ = 3265586002.

The previous prime is 6531171961. The next prime is 6531172007. The reversal of 6531172006 is 6002711356.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6531172007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1632793000 + ... + 1632793003.

It is an arithmetic number, because the mean of its divisors is an integer number (2449189503).

Almost surely, 2^6531172006 is an apocalyptic number.

6531172006 is a deficient number, since it is larger than the sum of its proper divisors (3265586006).

6531172006 is a wasteful number, since it uses less digits than its factorization.

6531172006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3265586005.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 6531172006 is about 80815.6668350884. Note that the first 3 decimals coincide. The cubic root of 6531172006 is about 1869.2341517775.

The spelling of 6531172006 in words is "six billion, five hundred thirty-one million, one hundred seventy-two thousand, six".