1323551213 has 8 divisors (see below), whose sum is σ = 1369894680. Its totient is φ = 1277254720.

The previous prime is 1323551209. The next prime is 1323551233. The reversal of 1323551213 is 3121553231.

It can be written as a sum of positive squares in 4 ways, for example, as 1024192009 + 299359204 = 32003^2 + 17302^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1323551213 - 2² = 1323551209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323551233) 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 7 ways as a sum of consecutive naturals, for example, 51431 + ... + 72747.

It is an arithmetic number, because the mean of its divisors is an integer number (171236835).

Almost surely, 2^1323551213 is an apocalyptic number.

It is an amenable number.

1323551213 is a deficient number, since it is larger than the sum of its proper divisors (46343467).

1323551213 is a wasteful number, since it uses less digits than its factorization.

1323551213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23487.

The product of its digits is 2700, while the sum is 26.

The square root of 1323551213 is about 36380.6433835357. The cubic root of 1323551213 is about 1097.9441526755.

The spelling of 1323551213 in words is "one billion, three hundred twenty-three million, five hundred fifty-one thousand, two hundred thirteen".