242515307 has 2 divisors, whose sum is σ = 242515308. Its totient is φ = 242515306.

The previous prime is 242515291. The next prime is 242515331. The reversal of 242515307 is 703515242.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242515307 - 2⁴ = 242515291 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 242515307.

It is not a weakly prime, because it can be changed into another prime (242515367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121257653 + 121257654.

It is an arithmetic number, because the mean of its divisors is an integer number (121257654).

Almost surely, 2^242515307 is an apocalyptic number.

242515307 is a deficient number, since it is larger than the sum of its proper divisors (1).

242515307 is an equidigital number, since it uses as much as digits as its factorization.

242515307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 242515307 is about 15572.9029727922. The cubic root of 242515307 is about 623.6099727841.

The spelling of 242515307 in words is "two hundred forty-two million, five hundred fifteen thousand, three hundred seven".