1343111511 has 32 divisors (see below), whose sum is σ = 2099545600. Its totient is φ = 763402752.

The previous prime is 1343111509. The next prime is 1343111513. The reversal of 1343111511 is 1151113431.

It is an interprime number because it is at equal distance from previous prime (1343111509) and next prime (1343111513).

It is not a de Polignac number, because 1343111511 - 2¹ = 1343111509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1343111513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 195216 + ... + 201978.

It is an arithmetic number, because the mean of its divisors is an integer number (65610800).

Almost surely, 2^1343111511 is an apocalyptic number.

1343111511 is a deficient number, since it is larger than the sum of its proper divisors (756434089).

1343111511 is an equidigital number, since it uses as much as digits as its factorization.

1343111511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6980 (or 6966 counting only the distinct ones).

The product of its digits is 180, while the sum is 21.

The square root of 1343111511 is about 36648.4857940952. The cubic root of 1343111511 is about 1103.3264350225.

Adding to 1343111511 its reverse (1151113431), we get a palindrome (2494224942).

It can be divided in two parts, 13431 and 11511, that added together give a palindrome (24942).

The spelling of 1343111511 in words is "one billion, three hundred forty-three million, one hundred eleven thousand, five hundred eleven".