2181625147 has 8 divisors (see below), whose sum is σ = 2487645216. Its totient is φ = 1895348352.

The previous prime is 2181625133. The next prime is 2181625151. The reversal of 2181625147 is 7415261812.

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 2181625147 - 2¹¹ = 2181623099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2181625447) 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, 4935583 + ... + 4936024.

It is an arithmetic number, because the mean of its divisors is an integer number (310955652).

Almost surely, 2^2181625147 is an apocalyptic number.

2181625147 is a deficient number, since it is larger than the sum of its proper divisors (306020069).

2181625147 is a wasteful number, since it uses less digits than its factorization.

2181625147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9871637.

The product of its digits is 26880, while the sum is 37.

The square root of 2181625147 is about 46707.8702897060. The cubic root of 2181625147 is about 1296.9603830228.

Adding to 2181625147 its reverse (7415261812), we get a palindrome (9596886959).

The spelling of 2181625147 in words is "two billion, one hundred eighty-one million, six hundred twenty-five thousand, one hundred forty-seven".