1311891310 has 16 divisors (see below), whose sum is σ = 2362239936. Its totient is φ = 524570848.

The previous prime is 1311891283. The next prime is 1311891311. The reversal of 1311891310 is 131981131.

It is a super-2 number, since 2×1311891310² = 3442117618507032200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311891311) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8532 + ... + 51928.

It is an arithmetic number, because the mean of its divisors is an integer number (147639996).

Almost surely, 2^1311891310 is an apocalyptic number.

1311891310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311891310 is a deficient number, since it is larger than the sum of its proper divisors (1050348626).

1311891310 is a wasteful number, since it uses less digits than its factorization.

1311891310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46427.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 1311891310 is about 36220.0401711539. The cubic root of 1311891310 is about 1094.7105035937.

The spelling of 1311891310 in words is "one billion, three hundred eleven million, eight hundred ninety-one thousand, three hundred ten".