242205140 has 48 divisors (see below), whose sum is σ = 518482944. Its totient is φ = 95020800.

The previous prime is 242205121. The next prime is 242205143. The reversal of 242205140 is 41502242.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242205143) 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, 398717 + ... + 399323.

It is an arithmetic number, because the mean of its divisors is an integer number (10801728).

Almost surely, 2^242205140 is an apocalyptic number.

242205140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242205140 is an abundant number, since it is smaller than the sum of its proper divisors (276277804).

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

242205140 is a wasteful number, since it uses less digits than its factorization.

242205140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968 (or 966 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 242205140 is about 15562.9412387248. The cubic root of 242205140 is about 623.3440022831.

Adding to 242205140 its reverse (41502242), we get a palindrome (283707382).

The spelling of 242205140 in words is "two hundred forty-two million, two hundred five thousand, one hundred forty".