631216 has 10 divisors (see below), whose sum is σ = 1223012. Its totient is φ = 315600.

The previous prime is 631187. The next prime is 631223. The reversal of 631216 is 612136.

It is a junction number, because it is equal to n+sod(n) for n = 631193 and 631202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19710 + ... + 19741.

2⁶³¹²¹⁶ is an apocalyptic number.

It is an amenable number.

631216 is a deficient number, since it is larger than the sum of its proper divisors (591796).

631216 is a wasteful number, since it uses less digits than its factorization.

631216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39459 (or 39453 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 631216 is about 794.4910320450. The cubic root of 631216 is about 85.7813084257.

It can be divided in two parts, 6312 and 16, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 631216 in words is "six hundred thirty-one thousand, two hundred sixteen".