242515812 has 96 divisors (see below), whose sum is σ = 747048960. Its totient is φ = 59281920.

The previous prime is 242515799. The next prime is 242515831. The reversal of 242515812 is 218515242.

It is a self number, because there is not a number n which added to its sum of digits gives 242515812.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7989 + ... + 23427.

It is an arithmetic number, because the mean of its divisors is an integer number (7781760).

Almost surely, 2^242515812 is an apocalyptic number.

242515812 is a gapful number since it is divisible by the number (22) 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 242515812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (373524480).

242515812 is an abundant number, since it is smaller than the sum of its proper divisors (504533148).

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

242515812 is a wasteful number, since it uses less digits than its factorization.

242515812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15481 (or 15479 counting only the distinct ones).

The product of its digits is 6400, while the sum is 30.

The square root of 242515812 is about 15572.9191868448. The cubic root of 242515812 is about 623.6104056404.

The spelling of 242515812 in words is "two hundred forty-two million, five hundred fifteen thousand, eight hundred twelve".