1311345622 has 4 divisors (see below), whose sum is σ = 1967018436. Its totient is φ = 655672810.

The previous prime is 1311345617. The next prime is 1311345649. The reversal of 1311345622 is 2265431131.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327836404 + ... + 327836407.

It is an arithmetic number, because the mean of its divisors is an integer number (491754609).

Almost surely, 2^1311345622 is an apocalyptic number.

1311345622 is a deficient number, since it is larger than the sum of its proper divisors (655672814).

1311345622 is an equidigital number, since it uses as much as digits as its factorization.

1311345622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655672813.

The product of its digits is 4320, while the sum is 28.

The square root of 1311345622 is about 36212.5064307899. The cubic root of 1311345622 is about 1094.5586990384.

Adding to 1311345622 its reverse (2265431131), we get a palindrome (3576776753).

The spelling of 1311345622 in words is "one billion, three hundred eleven million, three hundred forty-five thousand, six hundred twenty-two".