242131240 has 96 divisors (see below), whose sum is σ = 603532440. Its totient is φ = 86906880.

The previous prime is 242131223. The next prime is 242131259. The reversal of 242131240 is 42131242.

It can be written as a sum of positive squares in 12 ways, for example, as 80892036 + 161239204 = 8994^2 + 12698^2 .

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 23 ways as a sum of consecutive naturals, for example, 873982 + ... + 874258.

Almost surely, 2^242131240 is an apocalyptic number.

242131240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 242131240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301766220).

242131240 is an abundant number, since it is smaller than the sum of its proper divisors (361401200).

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

242131240 is a wasteful number, since it uses less digits than its factorization.

242131240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 242131240 is about 15560.5668277219. The cubic root of 242131240 is about 623.2805989939.

Adding to 242131240 its reverse (42131242), we get a palindrome (284262482).

The spelling of 242131240 in words is "two hundred forty-two million, one hundred thirty-one thousand, two hundred forty".