1311553311 has 16 divisors (see below), whose sum is σ = 1828020480. Its totient is φ = 834863040.

The previous prime is 1311553297. The next prime is 1311553361. The reversal of 1311553311 is 1133551131.

It is a happy number.

It is not a de Polignac number, because 1311553311 - 2⁷ = 1311553183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311553361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22755 + ... + 56043.

It is an arithmetic number, because the mean of its divisors is an integer number (114251280).

Almost surely, 2^1311553311 is an apocalyptic number.

1311553311 is a deficient number, since it is larger than the sum of its proper divisors (516467169).

1311553311 is a wasteful number, since it uses less digits than its factorization.

1311553311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33886.

The product of its digits is 675, while the sum is 24.

The square root of 1311553311 is about 36215.3739591351. The cubic root of 1311553311 is about 1094.6164808562.

The spelling of 1311553311 in words is "one billion, three hundred eleven million, five hundred fifty-three thousand, three hundred eleven".