2172634247 has 16 divisors (see below), whose sum is σ = 2535224832. Its totient is φ = 1823246880.

The previous prime is 2172634229. The next prime is 2172634283. The reversal of 2172634247 is 7424362712.

It is a happy number.

2172634247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2172634247 - 2¹⁶ = 2172568711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2172634247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172634207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176198 + ... + 188124.

It is an arithmetic number, because the mean of its divisors is an integer number (158451552).

Almost surely, 2^2172634247 is an apocalyptic number.

2172634247 is a deficient number, since it is larger than the sum of its proper divisors (362590585).

2172634247 is a wasteful number, since it uses less digits than its factorization.

2172634247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12478.

The product of its digits is 112896, while the sum is 38.

The square root of 2172634247 is about 46611.5248302391. The cubic root of 2172634247 is about 1295.1762548370.

Adding to 2172634247 its reverse (7424362712), we get a palindrome (9596996959).

The spelling of 2172634247 in words is "two billion, one hundred seventy-two million, six hundred thirty-four thousand, two hundred forty-seven".