1313431222 has 4 divisors (see below), whose sum is σ = 1970146836. Its totient is φ = 656715610.

The previous prime is 1313431211. The next prime is 1313431241. The reversal of 1313431222 is 2221343131.

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

It is a junction number, because it is equal to n+sod(n) for n = 1313431193 and 1313431202.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 328357804 + ... + 328357807.

It is an arithmetic number, because the mean of its divisors is an integer number (492536709).

Almost surely, 2^1313431222 is an apocalyptic number.

1313431222 is a deficient number, since it is larger than the sum of its proper divisors (656715614).

1313431222 is an equidigital number, since it uses as much as digits as its factorization.

1313431222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656715613.

The product of its digits is 864, while the sum is 22.

The square root of 1313431222 is about 36241.2916712415. The cubic root of 1313431222 is about 1095.1386637294.

Adding to 1313431222 its reverse (2221343131), we get a palindrome (3534774353).

The spelling of 1313431222 in words is "one billion, three hundred thirteen million, four hundred thirty-one thousand, two hundred twenty-two".