6731631 has 12 divisors (see below), whose sum is σ = 9795240. Its totient is φ = 4454640.

The previous prime is 6731623. The next prime is 6731633. The reversal of 6731631 is 1361376.

It is not a de Polignac number, because 6731631 - 2³ = 6731623 is a prime.

It is a super-2 number, since 2×6731631² = 90629711840322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6731595 and 6731604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6731633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1440 + ... + 3941.

It is an arithmetic number, because the mean of its divisors is an integer number (816270).

Almost surely, 2^6731631 is an apocalyptic number.

6731631 is a deficient number, since it is larger than the sum of its proper divisors (3063609).

6731631 is a wasteful number, since it uses less digits than its factorization.

6731631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5526 (or 5523 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 6731631 is about 2594.5386873200. The cubic root of 6731631 is about 188.8165684822.

It can be divided in two parts, 673 and 1631, that added together give a square (2304 = 48²).

The spelling of 6731631 in words is "six million, seven hundred thirty-one thousand, six hundred thirty-one".