242222172 has 12 divisors (see below), whose sum is σ = 565185096. Its totient is φ = 80740720.

The previous prime is 242222153. The next prime is 242222173. The reversal of 242222172 is 271222242.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242222173) 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, 10092579 + ... + 10092602.

It is an arithmetic number, because the mean of its divisors is an integer number (47098758).

Almost surely, 2^242222172 is an apocalyptic number.

It is an amenable number.

242222172 is an abundant number, since it is smaller than the sum of its proper divisors (322962924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

242222172 is a wasteful number, since it uses less digits than its factorization.

242222172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20185188 (or 20185186 counting only the distinct ones).

The product of its digits is 1792, while the sum is 24.

The square root of 242222172 is about 15563.4884264422. The cubic root of 242222172 is about 623.3586132394.

The spelling of 242222172 in words is "two hundred forty-two million, two hundred twenty-two thousand, one hundred seventy-two".