631211323 has 4 divisors (see below), whose sum is σ = 641909880. Its totient is φ = 620512768.

The previous prime is 631211311. The next prime is 631211381. The reversal of 631211323 is 323112136.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631211323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 631211294 and 631211303.

It is not an unprimeable number, because it can be changed into a prime (631211393) by changing a digit.

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, 5349190 + ... + 5349307.

It is an arithmetic number, because the mean of its divisors is an integer number (160477470).

Almost surely, 2^631211323 is an apocalyptic number.

631211323 is a deficient number, since it is larger than the sum of its proper divisors (10698557).

631211323 is a wasteful number, since it uses less digits than its factorization.

631211323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10698556.

The product of its digits is 648, while the sum is 22.

The square root of 631211323 is about 25123.9193399438. The cubic root of 631211323 is about 857.8109655944.

Adding to 631211323 its reverse (323112136), we get a palindrome (954323459).

It can be divided in two parts, 6312113 and 23, that added together give a palindrome (6312136).

The spelling of 631211323 in words is "six hundred thirty-one million, two hundred eleven thousand, three hundred twenty-three".