242815489 has 24 divisors (see below), whose sum is σ = 291207168. Its totient is φ = 198212160.

The previous prime is 242815483. The next prime is 242815499. The reversal of 242815489 is 984518242.

It is not a de Polignac number, because 242815489 - 2⁵ = 242815457 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242815483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 633792 + ... + 634174.

It is an arithmetic number, because the mean of its divisors is an integer number (12133632).

Almost surely, 2^242815489 is an apocalyptic number.

It is an amenable number.

242815489 is a deficient number, since it is larger than the sum of its proper divisors (48391679).

242815489 is an equidigital number, since it uses as much as digits as its factorization.

242815489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525 (or 478 counting only the distinct ones).

The product of its digits is 184320, while the sum is 43.

The square root of 242815489 is about 15582.5379511811. The cubic root of 242815489 is about 623.8671652171.

The spelling of 242815489 in words is "two hundred forty-two million, eight hundred fifteen thousand, four hundred eighty-nine".