2172265278 has 16 divisors (see below), whose sum is σ = 4356842256. Its totient is φ = 722036480.

The previous prime is 2172265259. The next prime is 2172265279. The reversal of 2172265278 is 8725622712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172265279) 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, 510693 + ... + 514928.

It is an arithmetic number, because the mean of its divisors is an integer number (272302641).

Almost surely, 2^2172265278 is an apocalyptic number.

2172265278 is an abundant number, since it is smaller than the sum of its proper divisors (2184576978).

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

2172265278 is a wasteful number, since it uses less digits than its factorization.

2172265278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025979.

The product of its digits is 188160, while the sum is 42.

The square root of 2172265278 is about 46607.5667461840. The cubic root of 2172265278 is about 1295.1029326410.

The spelling of 2172265278 in words is "two billion, one hundred seventy-two million, two hundred sixty-five thousand, two hundred seventy-eight".