2155504233 has 4 divisors (see below), whose sum is σ = 2874005648. Its totient is φ = 1437002820.

The previous prime is 2155504231. The next prime is 2155504243. The reversal of 2155504233 is 3324055512.

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 2155504233 - 2¹ = 2155504231 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 2155504233.

It is not an unprimeable number, because it can be changed into a prime (2155504231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359250703 + ... + 359250708.

It is an arithmetic number, because the mean of its divisors is an integer number (718501412).

Almost surely, 2^2155504233 is an apocalyptic number.

It is an amenable number.

2155504233 is a deficient number, since it is larger than the sum of its proper divisors (718501415).

2155504233 is an equidigital number, since it uses as much as digits as its factorization.

2155504233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718501414.

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 2155504233 is about 46427.4082089449. The cubic root of 2155504233 is about 1291.7633543791.

Adding to 2155504233 its reverse (3324055512), we get a palindrome (5479559745).

The spelling of 2155504233 in words is "two billion, one hundred fifty-five million, five hundred four thousand, two hundred thirty-three".