242931138 has 8 divisors (see below), whose sum is σ = 485862288. Its totient is φ = 80977044.

The previous prime is 242931137. The next prime is 242931167. The reversal of 242931138 is 831139242.

It is a sphenic number, since it is the product of 3 distinct primes.

242931138 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 242931099 and 242931108.

It is not an unprimeable number, because it can be changed into a prime (242931137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20244256 + ... + 20244267.

It is an arithmetic number, because the mean of its divisors is an integer number (60732786).

Almost surely, 2^242931138 is an apocalyptic number.

242931138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

242931138 is a wasteful number, since it uses less digits than its factorization.

242931138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40488528.

The product of its digits is 10368, while the sum is 33.

The square root of 242931138 is about 15586.2483619375. The cubic root of 242931138 is about 623.9661953663.

The spelling of 242931138 in words is "two hundred forty-two million, nine hundred thirty-one thousand, one hundred thirty-eight".