1213355343 has 4 divisors (see below), whose sum is σ = 1617807128. Its totient is φ = 808903560.

The previous prime is 1213355329. The next prime is 1213355359. The reversal of 1213355343 is 3435533121.

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

It is not a de Polignac number, because 1213355343 - 2⁶ = 1213355279 is a prime.

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 1213355343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213355383) 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, 202225888 + ... + 202225893.

It is an arithmetic number, because the mean of its divisors is an integer number (404451782).

Almost surely, 2^1213355343 is an apocalyptic number.

1213355343 is a deficient number, since it is larger than the sum of its proper divisors (404451785).

1213355343 is an equidigital number, since it uses as much as digits as its factorization.

1213355343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404451784.

The product of its digits is 16200, while the sum is 30.

The square root of 1213355343 is about 34833.2505373817. The cubic root of 1213355343 is about 1066.5863032012.

Adding to 1213355343 its reverse (3435533121), we get a palindrome (4648888464).

It can be divided in two parts, 12133 and 55343, that added together give a palindrome (67476).

The spelling of 1213355343 in words is "one billion, two hundred thirteen million, three hundred fifty-five thousand, three hundred forty-three".