242751820 has 24 divisors (see below), whose sum is σ = 523558224. Its totient is φ = 94476096.

The previous prime is 242751799. The next prime is 242751841. The reversal of 242751820 is 28157242.

It is a happy number.

242751820 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (242751799) and next prime (242751841).

It is a super-2 number, since 2×242751820² = 117856892226624800, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 163282 + ... + 164761.

It is an arithmetic number, because the mean of its divisors is an integer number (21814926).

Almost surely, 2^242751820 is an apocalyptic number.

242751820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242751820 is an abundant number, since it is smaller than the sum of its proper divisors (280806404).

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

242751820 is a wasteful number, since it uses less digits than its factorization.

242751820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328089 (or 328087 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 242751820 is about 15580.4948573529. The cubic root of 242751820 is about 623.8126320804.

The spelling of 242751820 in words is "two hundred forty-two million, seven hundred fifty-one thousand, eight hundred twenty".