1311131722 has 8 divisors (see below), whose sum is σ = 1972057536. Its totient is φ = 653779212.

The previous prime is 1311131719. The next prime is 1311131729. The reversal of 1311131722 is 2271311131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1311131693 and 1311131702.

It is not an unprimeable number, because it can be changed into a prime (1311131729) 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, 892408 + ... + 893875.

It is an arithmetic number, because the mean of its divisors is an integer number (246507192).

Almost surely, 2^1311131722 is an apocalyptic number.

1311131722 is a deficient number, since it is larger than the sum of its proper divisors (660925814).

1311131722 is a wasteful number, since it uses less digits than its factorization.

1311131722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786652.

The product of its digits is 252, while the sum is 22.

The square root of 1311131722 is about 36209.5529107997. The cubic root of 1311131722 is about 1094.4991828608.

Adding to 1311131722 its reverse (2271311131), we get a palindrome (3582442853).

The spelling of 1311131722 in words is "one billion, three hundred eleven million, one hundred thirty-one thousand, seven hundred twenty-two".