2155215333 has 4 divisors (see below), whose sum is σ = 2873620448. Its totient is φ = 1436810220.

The previous prime is 2155215323. The next prime is 2155215371. The reversal of 2155215333 is 3335125512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2155215333 - 2⁶ = 2155215269 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 2155215333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155215323) 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 3 ways as a sum of consecutive naturals, for example, 359202553 + ... + 359202558.

It is an arithmetic number, because the mean of its divisors is an integer number (718405112).

Almost surely, 2^2155215333 is an apocalyptic number.

It is an amenable number.

2155215333 is a deficient number, since it is larger than the sum of its proper divisors (718405115).

2155215333 is an equidigital number, since it uses as much as digits as its factorization.

2155215333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718405114.

The product of its digits is 13500, while the sum is 30.

The square root of 2155215333 is about 46424.2967959667. The cubic root of 2155215333 is about 1291.7056405657.

The spelling of 2155215333 in words is "two billion, one hundred fifty-five million, two hundred fifteen thousand, three hundred thirty-three".