172012222 has 24 divisors (see below), whose sum is σ = 276189480. Its totient is φ = 80327040.

The previous prime is 172012219. The next prime is 172012277. The reversal of 172012222 is 222210271.

It is a self number, because there is not a number n which added to its sum of digits gives 172012222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79272 + ... + 81412.

It is an arithmetic number, because the mean of its divisors is an integer number (11507895).

Almost surely, 2^172012222 is an apocalyptic number.

172012222 is a deficient number, since it is larger than the sum of its proper divisors (104177258).

172012222 is a wasteful number, since it uses less digits than its factorization.

172012222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316 (or 2299 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 172012222 is about 13115.3429997084. The cubic root of 172012222 is about 556.1429488559.

Adding to 172012222 its reverse (222210271), we get a palindrome (394222493).

The spelling of 172012222 in words is "one hundred seventy-two million, twelve thousand, two hundred twenty-two".