2155242233 has 4 divisors (see below), whose sum is σ = 2224766208. Its totient is φ = 2085718260.

The previous prime is 2155242227. The next prime is 2155242239. The reversal of 2155242233 is 3322425512.

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 an interprime number because it is at equal distance from previous prime (2155242227) and next prime (2155242239).

It is a cyclic number.

It is not a de Polignac number, because 2155242233 - 2⁴ = 2155242217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2155242196 and 2155242205.

It is not an unprimeable number, because it can be changed into a prime (2155242239) 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, 34761941 + ... + 34762002.

It is an arithmetic number, because the mean of its divisors is an integer number (556191552).

Almost surely, 2^2155242233 is an apocalyptic number.

It is an amenable number.

2155242233 is a deficient number, since it is larger than the sum of its proper divisors (69523975).

2155242233 is an equidigital number, since it uses as much as digits as its factorization.

2155242233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69523974.

The product of its digits is 14400, while the sum is 29.

The square root of 2155242233 is about 46424.5865140445. The cubic root of 2155242233 is about 1291.7110146207.

Adding to 2155242233 its reverse (3322425512), we get a palindrome (5477667745).

The spelling of 2155242233 in words is "two billion, one hundred fifty-five million, two hundred forty-two thousand, two hundred thirty-three".