1311422205 has 32 divisors (see below), whose sum is σ = 2147166720. Its totient is φ = 683277120.

The previous prime is 1311422149. The next prime is 1311422221. The reversal of 1311422205 is 5022241131.

It is not a de Polignac number, because 1311422205 - 2⁹ = 1311421693 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139710 + ... + 148800.

It is an arithmetic number, because the mean of its divisors is an integer number (67098960).

Almost surely, 2^1311422205 is an apocalyptic number.

1311422205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311422205 is a deficient number, since it is larger than the sum of its proper divisors (835744515).

1311422205 is a wasteful number, since it uses less digits than its factorization.

1311422205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9321.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1311422205 is about 36213.5638262792. The cubic root of 1311422205 is about 1094.5800061486.

Adding to 1311422205 its reverse (5022241131), we get a palindrome (6333663336).

The spelling of 1311422205 in words is "one billion, three hundred eleven million, four hundred twenty-two thousand, two hundred five".