1311148582 has 4 divisors (see below), whose sum is σ = 1966722876. Its totient is φ = 655574290.

The previous prime is 1311148577. The next prime is 1311148583. The reversal of 1311148582 is 2858411131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2858411131 = 89 ⋅32116979.

It is a super-2 number, since 2×1311148582² = 3438221208161221448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311148583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327787144 + ... + 327787147.

It is an arithmetic number, because the mean of its divisors is an integer number (491680719).

Almost surely, 2^1311148582 is an apocalyptic number.

1311148582 is a deficient number, since it is larger than the sum of its proper divisors (655574294).

1311148582 is an equidigital number, since it uses as much as digits as its factorization.

1311148582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655574293.

The product of its digits is 7680, while the sum is 34.

The square root of 1311148582 is about 36209.7857215422. The cubic root of 1311148582 is about 1094.5038742728.

The spelling of 1311148582 in words is "one billion, three hundred eleven million, one hundred forty-eight thousand, five hundred eighty-two".