631225633 has 8 divisors (see below), whose sum is σ = 634372200. Its totient is φ = 628087680.

The previous prime is 631225631. The next prime is 631225643. The reversal of 631225633 is 336522136.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 613089 + 630612544 = 783^2 + 25112^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 631225633 - 2¹ = 631225631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 631225595 and 631225604.

It is not an unprimeable number, because it can be changed into a prime (631225631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181293 + ... + 184741.

It is an arithmetic number, because the mean of its divisors is an integer number (79296525).

Almost surely, 2^631225633 is an apocalyptic number.

It is an amenable number.

631225633 is a deficient number, since it is larger than the sum of its proper divisors (3146567).

631225633 is a wasteful number, since it uses less digits than its factorization.

631225633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4307.

The product of its digits is 19440, while the sum is 31.

The square root of 631225633 is about 25124.2041266982. The cubic root of 631225633 is about 857.8174479359.

Adding to 631225633 its reverse (336522136), we get a palindrome (967747769).

The spelling of 631225633 in words is "six hundred thirty-one million, two hundred twenty-five thousand, six hundred thirty-three".