242620221541 has 8 divisors (see below), whose sum is σ = 247231553400. Its totient is φ = 238029339840.

The previous prime is 242620221497. The next prime is 242620221587. The reversal of 242620221541 is 145122026242.

242620221541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4943496100 + 237676725441 = 70310^2 + 487521^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 242620221541 - 2²³ = 242611832933 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 (242620222541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5088586 + ... + 5136043.

It is an arithmetic number, because the mean of its divisors is an integer number (30903944175).

Almost surely, 2^242620221541 is an apocalyptic number.

It is an amenable number.

242620221541 is a deficient number, since it is larger than the sum of its proper divisors (4611331859).

242620221541 is a wasteful number, since it uses less digits than its factorization.

242620221541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10225079.

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 242620221541 its reverse (145122026242), we get a palindrome (387742247783).

The spelling of 242620221541 in words is "two hundred forty-two billion, six hundred twenty million, two hundred twenty-one thousand, five hundred forty-one".