1311653381 has 16 divisors (see below), whose sum is σ = 1372035456. Its totient is φ = 1252794816.

The previous prime is 1311653363. The next prime is 1311653417. The reversal of 1311653381 is 1833561131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311653381 is a prime.

It is a super-2 number, since 2×1311653381² = 3440869183777462322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311653081) 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, 849296 + ... + 850838.

It is an arithmetic number, because the mean of its divisors is an integer number (85752216).

Almost surely, 2^1311653381 is an apocalyptic number.

It is an amenable number.

1311653381 is a deficient number, since it is larger than the sum of its proper divisors (60382075).

1311653381 is a wasteful number, since it uses less digits than its factorization.

1311653381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2012.

The product of its digits is 6480, while the sum is 32.

The square root of 1311653381 is about 36216.7555283463. The cubic root of 1311653381 is about 1094.6443194718.

The spelling of 1311653381 in words is "one billion, three hundred eleven million, six hundred fifty-three thousand, three hundred eighty-one".