2181607229 has 8 divisors (see below), whose sum is σ = 2312489088. Its totient is φ = 2051008960.

The previous prime is 2181607223. The next prime is 2181607231. The reversal of 2181607229 is 9227061812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2181607229 - 2²⁴ = 2164830013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2181607192 and 2181607201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181607223) 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, 54947 + ... + 85920.

It is an arithmetic number, because the mean of its divisors is an integer number (289061136).

Almost surely, 2^2181607229 is an apocalyptic number.

It is an amenable number.

2181607229 is a deficient number, since it is larger than the sum of its proper divisors (130881859).

2181607229 is a wasteful number, since it uses less digits than its factorization.

2181607229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141795.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 2181607229 is about 46707.6784800958. The cubic root of 2181607229 is about 1296.9568323059.

The spelling of 2181607229 in words is "two billion, one hundred eighty-one million, six hundred seven thousand, two hundred twenty-nine".