631128113 has 8 divisors (see below), whose sum is σ = 786861120. Its totient is φ = 491788080.

The previous prime is 631128109. The next prime is 631128139. The reversal of 631128113 is 311821136.

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

It is not a de Polignac number, because 631128113 - 2² = 631128109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631128193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4098158 + ... + 4098311.

It is an arithmetic number, because the mean of its divisors is an integer number (98357640).

Almost surely, 2^631128113 is an apocalyptic number.

It is an amenable number.

631128113 is a deficient number, since it is larger than the sum of its proper divisors (155733007).

631128113 is a wasteful number, since it uses less digits than its factorization.

631128113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8196487.

The product of its digits is 864, while the sum is 26.

The square root of 631128113 is about 25122.2632937401. The cubic root of 631128113 is about 857.7732700374.

Adding to 631128113 its reverse (311821136), we get a palindrome (942949249).

The spelling of 631128113 in words is "six hundred thirty-one million, one hundred twenty-eight thousand, one hundred thirteen".