6531216 has 20 divisors (see below), whose sum is σ = 16872432. Its totient is φ = 2177056.

The previous prime is 6531211. The next prime is 6531221. The reversal of 6531216 is 6121356.

It is an interprime number because it is at equal distance from previous prime (6531211) and next prime (6531221).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (6531211) 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, 67986 + ... + 68081.

Almost surely, 2^6531216 is an apocalyptic number.

It is an amenable number.

6531216 is an abundant number, since it is smaller than the sum of its proper divisors (10341216).

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

6531216 is a wasteful number, since it uses less digits than its factorization.

6531216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136078 (or 136072 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 6531216 is about 2555.6243855465. The cubic root of 6531216 is about 186.9238348824.

The spelling of 6531216 in words is "six million, five hundred thirty-one thousand, two hundred sixteen".