242545004220 has 96 divisors (see below), whose sum is σ = 689046414336. Its totient is φ = 63734809600.

The previous prime is 242545004209. The next prime is 242545004239. The reversal of 242545004220 is 22400545242.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8876980 + ... + 8904260.

It is an arithmetic number, because the mean of its divisors is an integer number (7177566816).

Almost surely, 2^242545004220 is an apocalyptic number.

242545004220 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 242545004220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344523207168).

242545004220 is an abundant number, since it is smaller than the sum of its proper divisors (446501410116).

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

242545004220 is a wasteful number, since it uses less digits than its factorization.

242545004220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29451 (or 29449 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 30.

Adding to 242545004220 its reverse (22400545242), we get a palindrome (264945549462).

The spelling of 242545004220 in words is "two hundred forty-two billion, five hundred forty-five million, four thousand, two hundred twenty".