2155244211 has 12 divisors (see below), whose sum is σ = 3116310288. Its totient is φ = 1435361904.

The previous prime is 2155244197. The next prime is 2155244219. The reversal of 2155244211 is 1124425512.

It is a happy number.

2155244211 is a `hidden beast` number, since 215 + 5 + 2 + 442 + 1 + 1 = 666.

It is not a de Polignac number, because 2155244211 - 2⁷ = 2155244083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2155244219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112960 + ... + 130653.

It is an arithmetic number, because the mean of its divisors is an integer number (259692524).

Almost surely, 2^2155244211 is an apocalyptic number.

2155244211 is a deficient number, since it is larger than the sum of its proper divisors (961066077).

2155244211 is a wasteful number, since it uses less digits than its factorization.

2155244211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244602 (or 244599 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 2155244211 is about 46424.6078174065. The cubic root of 2155244211 is about 1291.7114097818.

Adding to 2155244211 its reverse (1124425512), we get a palindrome (3279669723).

The spelling of 2155244211 in words is "two billion, one hundred fifty-five million, two hundred forty-four thousand, two hundred eleven".