242220665 has 16 divisors (see below), whose sum is σ = 296904960. Its totient is φ = 189646080.

The previous prime is 242220647. The next prime is 242220697. The reversal of 242220665 is 566022242.

It is a happy number.

It is not a de Polignac number, because 242220665 - 2⁸ = 242220409 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69392 + ... + 72798.

It is an arithmetic number, because the mean of its divisors is an integer number (18556560).

Almost surely, 2^242220665 is an apocalyptic number.

It is an amenable number.

242220665 is a deficient number, since it is larger than the sum of its proper divisors (54684295).

242220665 is a wasteful number, since it uses less digits than its factorization.

242220665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3712.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 242220665 is about 15563.4400117712. The cubic root of 242220665 is about 623.3573204822.

The spelling of 242220665 in words is "two hundred forty-two million, two hundred twenty thousand, six hundred sixty-five".