1543342231 has 4 divisors (see below), whose sum is σ = 1543424512. Its totient is φ = 1543259952.

The previous prime is 1543342217. The next prime is 1543342247. The reversal of 1543342231 is 1322433451.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1543342231 is a prime.

It is a super-2 number, since 2×1543342231² = 4763810483976114722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1543342231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1543312231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2251 + ... + 55603.

It is an arithmetic number, because the mean of its divisors is an integer number (385856128).

Almost surely, 2^1543342231 is an apocalyptic number.

1543342231 is a deficient number, since it is larger than the sum of its proper divisors (82281).

1543342231 is an equidigital number, since it uses as much as digits as its factorization.

1543342231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82280.

The product of its digits is 8640, while the sum is 28.

The square root of 1543342231 is about 39285.3946270112. The cubic root of 1543342231 is about 1155.6351599770.

Adding to 1543342231 its reverse (1322433451), we get a palindrome (2865775682).

The spelling of 1543342231 in words is "one billion, five hundred forty-three million, three hundred forty-two thousand, two hundred thirty-one".