1213541343 has 24 divisors (see below), whose sum is σ = 2108745600. Its totient is φ = 656954064.

The previous prime is 1213541339. The next prime is 1213541369. The reversal of 1213541343 is 3431453121.

It is a happy number.

It is not a de Polignac number, because 1213541343 - 2² = 1213541339 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213541383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 505713 + ... + 508106.

It is an arithmetic number, because the mean of its divisors is an integer number (87864400).

Almost surely, 2^1213541343 is an apocalyptic number.

1213541343 is a deficient number, since it is larger than the sum of its proper divisors (895204257).

1213541343 is a wasteful number, since it uses less digits than its factorization.

1213541343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013851 (or 1013848 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 1213541343 is about 34835.9202978764. The cubic root of 1213541343 is about 1066.6408008159.

Adding to 1213541343 its reverse (3431453121), we get a palindrome (4644994464).

The spelling of 1213541343 in words is "one billion, two hundred thirteen million, five hundred forty-one thousand, three hundred forty-three".