6531217 has 16 divisors (see below), whose sum is σ = 8221824. Its totient is φ = 5082000.

The previous prime is 6531211. The next prime is 6531221. The reversal of 6531217 is 7121356.

It is not a de Polignac number, because 6531217 - 2⁷ = 6531089 is a prime.

It is a Duffinian number.

6531217 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6531191 and 6531200.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 8967 + ... + 9667.

It is an arithmetic number, because the mean of its divisors is an integer number (513864).

Almost surely, 2^6531217 is an apocalyptic number.

It is an amenable number.

6531217 is a deficient number, since it is larger than the sum of its proper divisors (1690607).

6531217 is an equidigital number, since it uses as much as digits as its factorization.

6531217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741 (or 719 counting only the distinct ones).

The product of its digits is 1260, while the sum is 25.

The square root of 6531217 is about 2555.6245811934. The cubic root of 6531217 is about 186.9238444224.

It can be divided in two parts, 65 and 31217, that multiplied together give a triangular number (2029105 = T₂₀₁₄).

The spelling of 6531217 in words is "six million, five hundred thirty-one thousand, two hundred seventeen".