631016 has 8 divisors (see below), whose sum is σ = 1183170. Its totient is φ = 315504.

The previous prime is 631013. The next prime is 631039. The reversal of 631016 is 610136.

It can be written as a sum of positive squares in only one way, i.e., 568516 + 62500 = 754^2 + 250^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 630985 and 631003.

It is not an unprimeable number, because it can be changed into a prime (631013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39431 + ... + 39446.

2⁶³¹⁰¹⁶ is an apocalyptic number.

It is an amenable number.

631016 is a deficient number, since it is larger than the sum of its proper divisors (552154).

631016 is a wasteful number, since it uses less digits than its factorization.

631016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78883 (or 78879 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 631016 is about 794.3651553285. The cubic root of 631016 is about 85.7722475686.

The spelling of 631016 in words is "six hundred thirty-one thousand, sixteen".