242216685 has 48 divisors (see below), whose sum is σ = 428191920. Its totient is φ = 126643200.

The previous prime is 242216647. The next prime is 242216687. The reversal of 242216685 is 586612242.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 3884841 + 238331844 = 1971^2 + 15438^2 .

It is not a de Polignac number, because 242216685 - 2⁶ = 242216621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242216687) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 622471 + ... + 622859.

It is an arithmetic number, because the mean of its divisors is an integer number (8920665).

Almost surely, 2^242216685 is an apocalyptic number.

It is an amenable number.

242216685 is a deficient number, since it is larger than the sum of its proper divisors (185975235).

242216685 is a wasteful number, since it uses less digits than its factorization.

242216685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638 (or 635 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 242216685 is about 15563.3121474833. The cubic root of 242216685 is about 623.3539062735.

The spelling of 242216685 in words is "two hundred forty-two million, two hundred sixteen thousand, six hundred eighty-five".