2185471229 has 4 divisors (see below), whose sum is σ = 2207109660. Its totient is φ = 2163832800.

The previous prime is 2185471213. The next prime is 2185471231. The reversal of 2185471229 is 9221745812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1088868004 + 1096603225 = 32998^2 + 33115^2 .

It is a cyclic number.

It is not a de Polignac number, because 2185471229 - 2⁴ = 2185471213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2185471279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10819064 + ... + 10819265.

It is an arithmetic number, because the mean of its divisors is an integer number (551777415).

Almost surely, 2^2185471229 is an apocalyptic number.

It is an amenable number.

2185471229 is a deficient number, since it is larger than the sum of its proper divisors (21638431).

2185471229 is a wasteful number, since it uses less digits than its factorization.

2185471229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21638430.

The product of its digits is 80640, while the sum is 41.

The square root of 2185471229 is about 46749.0238293807. The cubic root of 2185471229 is about 1297.7220915659.

The spelling of 2185471229 in words is "two billion, one hundred eighty-five million, four hundred seventy-one thousand, two hundred twenty-nine".