242210681 has 4 divisors (see below), whose sum is σ = 242571252. Its totient is φ = 241850112.

The previous prime is 242210671. The next prime is 242210711. The reversal of 242210681 is 186012242.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 119355625 + 122855056 = 10925^2 + 11084^2 .

It is a cyclic number.

It is not a de Polignac number, because 242210681 - 2²² = 238016377 is a prime.

It is a super-2 number, since 2×242210681² = 117332027980967522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 242210681.

It is not an unprimeable number, because it can be changed into a prime (242210671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179276 + ... + 180621.

It is an arithmetic number, because the mean of its divisors is an integer number (60642813).

Almost surely, 2^242210681 is an apocalyptic number.

It is an amenable number.

242210681 is a deficient number, since it is larger than the sum of its proper divisors (360571).

242210681 is an equidigital number, since it uses as much as digits as its factorization.

242210681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360570.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 242210681 is about 15563.1192567557. The cubic root of 242210681 is about 623.3487557230.

The spelling of 242210681 in words is "two hundred forty-two million, two hundred ten thousand, six hundred eighty-one".