2155430845 has 8 divisors (see below), whose sum is σ = 2589086520. Its totient is φ = 1722631680.

The previous prime is 2155430843. The next prime is 2155430911. The reversal of 2155430845 is 5480345512.

It can be written as a sum of positive squares in 4 ways, for example, as 15350724 + 2140080121 = 3918^2 + 46261^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2155430845 - 2¹ = 2155430843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155430843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208576 + ... + 218665.

It is an arithmetic number, because the mean of its divisors is an integer number (323635815).

Almost surely, 2^2155430845 is an apocalyptic number.

It is an amenable number.

2155430845 is a deficient number, since it is larger than the sum of its proper divisors (433655675).

2155430845 is a wasteful number, since it uses less digits than its factorization.

2155430845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428255.

The product of its (nonzero) digits is 96000, while the sum is 37.

The square root of 2155430845 is about 46426.6178501084. The cubic root of 2155430845 is about 1291.7486940808.

The spelling of 2155430845 in words is "two billion, one hundred fifty-five million, four hundred thirty thousand, eight hundred forty-five".