1011230543 has 4 divisors (see below), whose sum is σ = 1011877440. Its totient is φ = 1010583648.

The previous prime is 1011230503. The next prime is 1011230569. The reversal of 1011230543 is 3450321101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1011230543 - 2²⁸ = 742795087 is a prime.

It is a super-2 number, since 2×1011230543² = 2045174422192149698, 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 (1011230503) 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, 321098 + ... + 324231.

It is an arithmetic number, because the mean of its divisors is an integer number (252969360).

Almost surely, 2^1011230543 is an apocalyptic number.

1011230543 is a deficient number, since it is larger than the sum of its proper divisors (646897).

1011230543 is an equidigital number, since it uses as much as digits as its factorization.

1011230543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646896.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1011230543 is about 31799.8513046838. The cubic root of 1011230543 is about 1003.7295872199.

Adding to 1011230543 its reverse (3450321101), we get a palindrome (4461551644).

The spelling of 1011230543 in words is "one billion, eleven million, two hundred thirty thousand, five hundred forty-three".