631315049 has 4 divisors (see below), whose sum is σ = 632052564. Its totient is φ = 630577536.

The previous prime is 631315037. The next prime is 631315057. The reversal of 631315049 is 940513136.

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

It can be written as a sum of positive squares in 2 ways, for example, as 475240000 + 156075049 = 21800^2 + 12493^2 .

It is a cyclic number.

It is not a de Polignac number, because 631315049 - 2⁸ = 631314793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (631315019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367472 + ... + 369185.

It is an arithmetic number, because the mean of its divisors is an integer number (158013141).

Almost surely, 2^631315049 is an apocalyptic number.

It is an amenable number.

631315049 is a deficient number, since it is larger than the sum of its proper divisors (737515).

631315049 is an equidigital number, since it uses as much as digits as its factorization.

631315049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737514.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 631315049 is about 25125.9835429382. The cubic root of 631315049 is about 857.8579506127.

The spelling of 631315049 in words is "six hundred thirty-one million, three hundred fifteen thousand, forty-nine".