2156455228 has 12 divisors (see below), whose sum is σ = 3774686832. Its totient is φ = 1077973280.

The previous prime is 2156455193. The next prime is 2156455247. The reversal of 2156455228 is 8225546512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43825 + ... + 78952.

It is an arithmetic number, because the mean of its divisors is an integer number (314557236).

Almost surely, 2^2156455228 is an apocalyptic number.

It is an amenable number.

2156455228 is a deficient number, since it is larger than the sum of its proper divisors (1618231604).

2156455228 is a wasteful number, since it uses less digits than its factorization.

2156455228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127172 (or 127170 counting only the distinct ones).

The product of its digits is 192000, while the sum is 40.

The square root of 2156455228 is about 46437.6488207575. The cubic root of 2156455228 is about 1291.9532990880.

The spelling of 2156455228 in words is "two billion, one hundred fifty-six million, four hundred fifty-five thousand, two hundred twenty-eight".