631326113 has 4 divisors (see below), whose sum is σ = 688719408. Its totient is φ = 573932820.

The previous prime is 631326083. The next prime is 631326133. The reversal of 631326113 is 311623136.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 631326113 - 2¹² = 631322017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631326133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28696631 + ... + 28696652.

It is an arithmetic number, because the mean of its divisors is an integer number (172179852).

Almost surely, 2^631326113 is an apocalyptic number.

It is an amenable number.

631326113 is a deficient number, since it is larger than the sum of its proper divisors (57393295).

631326113 is a wasteful number, since it uses less digits than its factorization.

631326113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57393294.

The product of its digits is 1944, while the sum is 26.

The square root of 631326113 is about 25126.2037124592. The cubic root of 631326113 is about 857.8629619960.

Adding to 631326113 its reverse (311623136), we get a palindrome (942949249).

The spelling of 631326113 in words is "six hundred thirty-one million, three hundred twenty-six thousand, one hundred thirteen".