2155872258 has 48 divisors (see below), whose sum is σ = 4761446976. Its totient is φ = 704823840.

The previous prime is 2155872233. The next prime is 2155872283. The reversal of 2155872258 is 8522785512.

2155872258 is a `hidden beast` number, since 2 + 1 + 558 + 72 + 25 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (2155872233) and next prime (2155872283).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 247485 + ... + 256047.

It is an arithmetic number, because the mean of its divisors is an integer number (99196812).

Almost surely, 2^2155872258 is an apocalyptic number.

2155872258 is an abundant number, since it is smaller than the sum of its proper divisors (2605574718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2155872258 is a wasteful number, since it uses less digits than its factorization.

2155872258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8839 (or 8836 counting only the distinct ones).

The product of its digits is 448000, while the sum is 45.

The square root of 2155872258 is about 46431.3714852361. The cubic root of 2155872258 is about 1291.8368675966.

The spelling of 2155872258 in words is "two billion, one hundred fifty-five million, eight hundred seventy-two thousand, two hundred fifty-eight".