631242313 has 8 divisors (see below), whose sum is σ = 681598400. Its totient is φ = 581143248.

The previous prime is 631242299. The next prime is 631242323. The reversal of 631242313 is 313242136.

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 631242313 - 2²¹ = 629145161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631242323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59133 + ... + 68986.

It is an arithmetic number, because the mean of its divisors is an integer number (85199800).

Almost surely, 2^631242313 is an apocalyptic number.

It is an amenable number.

631242313 is a deficient number, since it is larger than the sum of its proper divisors (50356087).

631242313 is a wasteful number, since it uses less digits than its factorization.

631242313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128511.

The product of its digits is 2592, while the sum is 25.

The square root of 631242313 is about 25124.5360753189. The cubic root of 631242313 is about 857.8250037492.

Adding to 631242313 its reverse (313242136), we get a palindrome (944484449).

The spelling of 631242313 in words is "six hundred thirty-one million, two hundred forty-two thousand, three hundred thirteen".