2189178285 has 16 divisors (see below), whose sum is σ = 4003069056. Its totient is φ = 1000767168.

The previous prime is 2189178263. The next prime is 2189178307. The reversal of 2189178285 is 5828719812.

2189178285 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2189178263) and next prime (2189178307).

It is not a de Polignac number, because 2189178285 - 2⁸ = 2189178029 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10424554 + ... + 10424763.

It is an arithmetic number, because the mean of its divisors is an integer number (250191816).

Almost surely, 2^2189178285 is an apocalyptic number.

It is an amenable number.

2189178285 is a deficient number, since it is larger than the sum of its proper divisors (1813890771).

2189178285 is a wasteful number, since it uses less digits than its factorization.

2189178285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20849332.

The product of its digits is 645120, while the sum is 51.

The square root of 2189178285 is about 46788.6555160543. The cubic root of 2189178285 is about 1298.4554209783.

The spelling of 2189178285 in words is "two billion, one hundred eighty-nine million, one hundred seventy-eight thousand, two hundred eighty-five".