242647155221 has 8 divisors (see below), whose sum is σ = 243084245184. Its totient is φ = 242210258080.

The previous prime is 242647155203. The next prime is 242647155287. The reversal of 242647155221 is 122551746242.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242647155221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242647655221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2601041 + ... + 2692713.

It is an arithmetic number, because the mean of its divisors is an integer number (30385530648).

Almost surely, 2^242647155221 is an apocalyptic number.

It is an amenable number.

242647155221 is a deficient number, since it is larger than the sum of its proper divisors (437089963).

242647155221 is an equidigital number, since it uses as much as digits as its factorization.

242647155221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96411.

The product of its digits is 268800, while the sum is 41.

The spelling of 242647155221 in words is "two hundred forty-two billion, six hundred forty-seven million, one hundred fifty-five thousand, two hundred twenty-one".