242531220 has 48 divisors (see below), whose sum is σ = 679811328. Its totient is φ = 64606080.

The previous prime is 242531167. The next prime is 242531221. The reversal of 242531220 is 22135242.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242531221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81397 + ... + 84323.

It is an arithmetic number, because the mean of its divisors is an integer number (14162736).

Almost surely, 2^242531220 is an apocalyptic number.

242531220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242531220 is an abundant number, since it is smaller than the sum of its proper divisors (437280108).

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

242531220 is a wasteful number, since it uses less digits than its factorization.

242531220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4320 (or 4318 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 242531220 is about 15573.4138839241. The cubic root of 242531220 is about 623.6236121822.

Adding to 242531220 its reverse (22135242), we get a palindrome (264666462).

The spelling of 242531220 in words is "two hundred forty-two million, five hundred thirty-one thousand, two hundred twenty".