631316642 has 32 divisors (see below), whose sum is σ = 1043691264. Its totient is φ = 284029200.

The previous prime is 631316551. The next prime is 631316657. The reversal of 631316642 is 246613136.

It is a junction number, because it is equal to n+sod(n) for n = 631316599 and 631316608.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1424873 + ... + 1425315.

It is an arithmetic number, because the mean of its divisors is an integer number (32615352).

Almost surely, 2^631316642 is an apocalyptic number.

631316642 is a deficient number, since it is larger than the sum of its proper divisors (412374622).

631316642 is a wasteful number, since it uses less digits than its factorization.

631316642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974.

The product of its digits is 15552, while the sum is 32.

The square root of 631316642 is about 25126.0152431698. The cubic root of 631316642 is about 857.8586721577.

Adding to 631316642 its reverse (246613136), we get a palindrome (877929778).

The spelling of 631316642 in words is "six hundred thirty-one million, three hundred sixteen thousand, six hundred forty-two".