172143236 has 6 divisors (see below), whose sum is σ = 301250670. Its totient is φ = 86071616.

The previous prime is 172143229. The next prime is 172143259. The reversal of 172143236 is 632341271.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 172134400 + 8836 = 13120^2 + 94^2 .

It is a junction number, because it is equal to n+sod(n) for n = 172143199 and 172143208.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21517901 + ... + 21517908.

It is an arithmetic number, because the mean of its divisors is an integer number (50208445).

Almost surely, 2^172143236 is an apocalyptic number.

It is an amenable number.

172143236 is a deficient number, since it is larger than the sum of its proper divisors (129107434).

172143236 is a wasteful number, since it uses less digits than its factorization.

172143236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43035813 (or 43035811 counting only the distinct ones).

The product of its digits is 6048, while the sum is 29.

The square root of 172143236 is about 13120.3367334836. The cubic root of 172143236 is about 556.2841094094.

The spelling of 172143236 in words is "one hundred seventy-two million, one hundred forty-three thousand, two hundred thirty-six".