2173722147 has 12 divisors (see below), whose sum is σ = 3140935200. Its totient is φ = 1448633808.

The previous prime is 2173722143. The next prime is 2173722217. The reversal of 2173722147 is 7412273712.

It is not a de Polignac number, because 2173722147 - 2² = 2173722143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2173722143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15147 + ... + 67652.

It is an arithmetic number, because the mean of its divisors is an integer number (261744600).

Almost surely, 2^2173722147 is an apocalyptic number.

2173722147 is a deficient number, since it is larger than the sum of its proper divisors (967213053).

2173722147 is a wasteful number, since it uses less digits than its factorization.

2173722147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85722 (or 85719 counting only the distinct ones).

The product of its digits is 32928, while the sum is 36.

The square root of 2173722147 is about 46623.1932304084. The cubic root of 2173722147 is about 1295.3923960084.

Adding to 2173722147 its reverse (7412273712), we get a palindrome (9585995859).

The spelling of 2173722147 in words is "two billion, one hundred seventy-three million, seven hundred twenty-two thousand, one hundred forty-seven".