242133138 has 40 divisors (see below), whose sum is σ = 584297868. Its totient is φ = 74501856.

The previous prime is 242133137. The next prime is 242133163. The reversal of 242133138 is 831331242.

242133138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 238795209 + 3337929 = 15453^2 + 1827^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (242133137) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 55381 + ... + 59592.

Almost surely, 2^242133138 is an apocalyptic number.

242133138 is an abundant number, since it is smaller than the sum of its proper divisors (342164730).

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

242133138 is a wasteful number, since it uses less digits than its factorization.

242133138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115000 (or 114991 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 242133138 is about 15560.6278150979. The cubic root of 242133138 is about 623.2822275645.

The spelling of 242133138 in words is "two hundred forty-two million, one hundred thirty-three thousand, one hundred thirty-eight".