1311154343 has 4 divisors (see below), whose sum is σ = 1311992640. Its totient is φ = 1310316048.

The previous prime is 1311154309. The next prime is 1311154357. The reversal of 1311154343 is 3434511131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3434511131 = 8273 ⋅415147.

It is a cyclic number.

It is not a de Polignac number, because 1311154343 - 2⁶ = 1311154279 is a prime.

It is a super-2 number, since 2×1311154343² = 3438251422335523298, 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 (1311154363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416798 + ... + 419931.

It is an arithmetic number, because the mean of its divisors is an integer number (327998160).

Almost surely, 2^1311154343 is an apocalyptic number.

1311154343 is a deficient number, since it is larger than the sum of its proper divisors (838297).

1311154343 is an equidigital number, since it uses as much as digits as its factorization.

1311154343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838296.

The product of its digits is 2160, while the sum is 26.

The square root of 1311154343 is about 36209.8652717737. The cubic root of 1311154343 is about 1094.5054773018.

Adding to 1311154343 its reverse (3434511131), we get a palindrome (4745665474).

The spelling of 1311154343 in words is "one billion, three hundred eleven million, one hundred fifty-four thousand, three hundred forty-three".