242971815 has 32 divisors (see below), whose sum is σ = 396184320. Its totient is φ = 127125504.

The previous prime is 242971789. The next prime is 242971843. The reversal of 242971815 is 518179242.

It is not a de Polignac number, because 242971815 - 2⁹ = 242971303 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 420807 + ... + 421383.

It is an arithmetic number, because the mean of its divisors is an integer number (12380760).

Almost surely, 2^242971815 is an apocalyptic number.

242971815 is a deficient number, since it is larger than the sum of its proper divisors (153212505).

242971815 is a wasteful number, since it uses less digits than its factorization.

242971815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071.

The product of its digits is 40320, while the sum is 39.

The square root of 242971815 is about 15587.5532076077. The cubic root of 242971815 is about 624.0010195784.

The spelling of 242971815 in words is "two hundred forty-two million, nine hundred seventy-one thousand, eight hundred fifteen".