172724212 has 24 divisors (see below), whose sum is σ = 318651200. Its totient is φ = 81694656.

The previous prime is 172724197. The next prime is 172724213. The reversal of 172724212 is 212427271.

It is a super-2 number, since 2×172724212² = 59667306822041888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172724213) 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, 68608 + ... + 71080.

Almost surely, 2^172724212 is an apocalyptic number.

It is an amenable number.

172724212 is a deficient number, since it is larger than the sum of its proper divisors (145926988).

172724212 is a wasteful number, since it uses less digits than its factorization.

172724212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3415 (or 3413 counting only the distinct ones).

The product of its digits is 3136, while the sum is 28.

The square root of 172724212 is about 13142.4583697267. The cubic root of 172724212 is about 556.9092183263.

The spelling of 172724212 in words is "one hundred seventy-two million, seven hundred twenty-four thousand, two hundred twelve".