242505220 has 24 divisors (see below), whose sum is σ = 509923008. Its totient is φ = 96876000.

The previous prime is 242505203. The next prime is 242505223. The reversal of 242505220 is 22505242.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 242505191 and 242505200.

It is not an unprimeable number, because it can be changed into a prime (242505223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8745 + ... + 23695.

It is an arithmetic number, because the mean of its divisors is an integer number (21246792).

Almost surely, 2^242505220 is an apocalyptic number.

242505220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242505220 is an abundant number, since it is smaller than the sum of its proper divisors (267417788).

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

242505220 is a wasteful number, since it uses less digits than its factorization.

242505220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15771 (or 15769 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 242505220 is about 15572.5791055946. The cubic root of 242505220 is about 623.6013266756.

Adding to 242505220 its sum of digits (22), we get a palindrome (242505242).

The spelling of 242505220 in words is "two hundred forty-two million, five hundred five thousand, two hundred twenty".