1145330311 has 4 divisors (see below), whose sum is σ = 1148215672. Its totient is φ = 1142444952.

The previous prime is 1145330269. The next prime is 1145330353. The reversal of 1145330311 is 1130335411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1130335411 = 367 ⋅3079933.

It is an interprime number because it is at equal distance from previous prime (1145330269) and next prime (1145330353).

It is a cyclic number.

It is not a de Polignac number, because 1145330311 - 2⁷ = 1145330183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145330111) 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, 1442085 + ... + 1442878.

It is an arithmetic number, because the mean of its divisors is an integer number (287053918).

Almost surely, 2^1145330311 is an apocalyptic number.

1145330311 is a deficient number, since it is larger than the sum of its proper divisors (2885361).

1145330311 is an equidigital number, since it uses as much as digits as its factorization.

1145330311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2885360.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1145330311 is about 33842.7290713973. The cubic root of 1145330311 is about 1046.2695469789.

Adding to 1145330311 its reverse (1130335411), we get a palindrome (2275665722).

The spelling of 1145330311 in words is "one billion, one hundred forty-five million, three hundred thirty thousand, three hundred eleven".