2155107489 has 4 divisors (see below), whose sum is σ = 2873476656. Its totient is φ = 1436738324.

The previous prime is 2155107481. The next prime is 2155107503. The reversal of 2155107489 is 9847015512.

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 a cyclic number.

It is not a de Polignac number, because 2155107489 - 2³ = 2155107481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2155107489.

It is not an unprimeable number, because it can be changed into a prime (2155107481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359184579 + ... + 359184584.

It is an arithmetic number, because the mean of its divisors is an integer number (718369164).

Almost surely, 2^2155107489 is an apocalyptic number.

It is an amenable number.

2155107489 is a deficient number, since it is larger than the sum of its proper divisors (718369167).

2155107489 is an equidigital number, since it uses as much as digits as its factorization.

2155107489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718369166.

The product of its (nonzero) digits is 100800, while the sum is 42.

The square root of 2155107489 is about 46423.1352775747. The cubic root of 2155107489 is about 1291.6840951507.

The spelling of 2155107489 in words is "two billion, one hundred fifty-five million, one hundred seven thousand, four hundred eighty-nine".