1323551215 has 16 divisors (see below), whose sum is σ = 1894076928. Its totient is φ = 868117536.

The previous prime is 1323551209. The next prime is 1323551233. The reversal of 1323551215 is 5121553231.

It is a cyclic number.

It is not a de Polignac number, because 1323551215 - 2¹⁵ = 1323518447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 821277 + ... + 822886.

It is an arithmetic number, because the mean of its divisors is an integer number (118379808).

Almost surely, 2^1323551215 is an apocalyptic number.

1323551215 is a deficient number, since it is larger than the sum of its proper divisors (570525713).

1323551215 is a wasteful number, since it uses less digits than its factorization.

1323551215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644198.

The product of its digits is 4500, while the sum is 28.

The square root of 1323551215 is about 36380.6434110228. The cubic root of 1323551215 is about 1097.9441532285.

The spelling of 1323551215 in words is "one billion, three hundred twenty-three million, five hundred fifty-one thousand, two hundred fifteen".