242118172 has 6 divisors (see below), whose sum is σ = 423706808. Its totient is φ = 121059084.

The previous prime is 242118169. The next prime is 242118179. The reversal of 242118172 is 271811242.

It is a self number, because there is not a number n which added to its sum of digits gives 242118172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242118179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30264768 + ... + 30264775.

Almost surely, 2^242118172 is an apocalyptic number.

It is an amenable number.

242118172 is a deficient number, since it is larger than the sum of its proper divisors (181588636).

242118172 is a wasteful number, since it uses less digits than its factorization.

242118172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60529547 (or 60529545 counting only the distinct ones).

The product of its digits is 1792, while the sum is 28.

The square root of 242118172 is about 15560.1469144735. The cubic root of 242118172 is about 623.2693858223.

The spelling of 242118172 in words is "two hundred forty-two million, one hundred eighteen thousand, one hundred seventy-two".