242515305 has 24 divisors (see below), whose sum is σ = 421274880. Its totient is φ = 129060000.

The previous prime is 242515291. The next prime is 242515307. The reversal of 242515305 is 503515242.

It is a happy number.

It is not a de Polignac number, because 242515305 - 2⁹ = 242514793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (242515307) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 15930 + ... + 27180.

It is an arithmetic number, because the mean of its divisors is an integer number (17553120).

Almost surely, 2^242515305 is an apocalyptic number.

It is an amenable number.

242515305 is a deficient number, since it is larger than the sum of its proper divisors (178759575).

242515305 is a wasteful number, since it uses less digits than its factorization.

242515305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11741 (or 11738 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 242515305 is about 15572.9029085781. The cubic root of 242515305 is about 623.6099710699.

The spelling of 242515305 in words is "two hundred forty-two million, five hundred fifteen thousand, three hundred five".