631138102 has 8 divisors (see below), whose sum is σ = 1081951056. Its totient is φ = 270487752.

The previous prime is 631138097. The next prime is 631138103. The reversal of 631138102 is 201831136.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631138103) 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 3 ways as a sum of consecutive naturals, for example, 22540633 + ... + 22540660.

It is an arithmetic number, because the mean of its divisors is an integer number (135243882).

Almost surely, 2^631138102 is an apocalyptic number.

631138102 is a deficient number, since it is larger than the sum of its proper divisors (450812954).

631138102 is a wasteful number, since it uses less digits than its factorization.

631138102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45081302.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 631138102 is about 25122.4621006780. The cubic root of 631138102 is about 857.7777954007. Note that the first 4 decimals are identical.

Adding to 631138102 its reverse (201831136), we get a palindrome (832969238).

The spelling of 631138102 in words is "six hundred thirty-one million, one hundred thirty-eight thousand, one hundred two".