172247732 has 12 divisors (see below), whose sum is σ = 301589316. Its totient is φ = 86079360.

The previous prime is 172247717. The next prime is 172247737. The reversal of 172247732 is 237742271.

It can be written as a sum of positive squares in 2 ways, for example, as 89000356 + 83247376 = 9434^2 + 9124^2 .

It is a junction number, because it is equal to n+sod(n) for n = 172247692 and 172247701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172247737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1493 + ... + 18620.

It is an arithmetic number, because the mean of its divisors is an integer number (25132443).

Almost surely, 2^172247732 is an apocalyptic number.

It is an amenable number.

172247732 is a deficient number, since it is larger than the sum of its proper divisors (129341584).

172247732 is a wasteful number, since it uses less digits than its factorization.

172247732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22258 (or 22256 counting only the distinct ones).

The product of its digits is 32928, while the sum is 35.

The square root of 172247732 is about 13124.3183442036. The cubic root of 172247732 is about 556.3966469054.

The spelling of 172247732 in words is "one hundred seventy-two million, two hundred forty-seven thousand, seven hundred thirty-two".