631123315 has 4 divisors (see below), whose sum is σ = 757347984. Its totient is φ = 504898648.

The previous prime is 631123309. The next prime is 631123357. The reversal of 631123315 is 513321136.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 631123315 - 2⁹ = 631122803 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 631123315.

It is an unprimeable number.

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, 63112327 + ... + 63112336.

It is an arithmetic number, because the mean of its divisors is an integer number (189336996).

Almost surely, 2^631123315 is an apocalyptic number.

631123315 is a deficient number, since it is larger than the sum of its proper divisors (126224669).

631123315 is a wasteful number, since it uses less digits than its factorization.

631123315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126224668.

The product of its digits is 1620, while the sum is 25.

The square root of 631123315 is about 25122.1678005701. The cubic root of 631123315 is about 857.7710963601.

The spelling of 631123315 in words is "six hundred thirty-one million, one hundred twenty-three thousand, three hundred fifteen".