2156442255 has 24 divisors (see below), whose sum is σ = 4077637200. Its totient is φ = 1045547520.

The previous prime is 2156442227. The next prime is 2156442263. The reversal of 2156442255 is 5522446512.

2156442255 is a `hidden beast` number, since 2 + 1 + 5 + 644 + 2 + 2 + 5 + 5 = 666.

It is not a de Polignac number, because 2156442255 - 2⁸ = 2156441999 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2177730 + ... + 2178719.

It is an arithmetic number, because the mean of its divisors is an integer number (169901550).

Almost surely, 2^2156442255 is an apocalyptic number.

2156442255 is a deficient number, since it is larger than the sum of its proper divisors (1921194945).

2156442255 is a wasteful number, since it uses less digits than its factorization.

2156442255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4356471 (or 4356468 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

The square root of 2156442255 is about 46437.5091386263. The cubic root of 2156442255 is about 1291.9507083327.

Adding to 2156442255 its reverse (5522446512), we get a palindrome (7678888767).

The spelling of 2156442255 in words is "two billion, one hundred fifty-six million, four hundred forty-two thousand, two hundred fifty-five".