2155872234 has 16 divisors (see below), whose sum is σ = 4403484288. Its totient is φ = 703334112.

The previous prime is 2155872233. The next prime is 2155872283. The reversal of 2155872234 is 4322785512.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2155872192 and 2155872201.

It is not an unprimeable number, because it can be changed into a prime (2155872233) 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, 3822187 + ... + 3822750.

It is an arithmetic number, because the mean of its divisors is an integer number (275217768).

Almost surely, 2^2155872234 is an apocalyptic number.

2155872234 is an abundant number, since it is smaller than the sum of its proper divisors (2247612054).

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

2155872234 is a wasteful number, since it uses less digits than its factorization.

2155872234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7644989.

The product of its digits is 134400, while the sum is 39.

The square root of 2155872234 is about 46431.3712267902. The cubic root of 2155872234 is about 1291.8368628029.

The spelling of 2155872234 in words is "two billion, one hundred fifty-five million, eight hundred seventy-two thousand, two hundred thirty-four".