242006221531 has 2 divisors, whose sum is σ = 242006221532. Its totient is φ = 242006221530.

The previous prime is 242006221511. The next prime is 242006221571. The reversal of 242006221531 is 135122600242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242006221531 - 2²⁵ = 241972667099 is a prime.

It is a super-2 number, since 2×242006221531² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 242006221531.

It is not a weakly prime, because it can be changed into another prime (242006221511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121003110765 + 121003110766.

It is an arithmetic number, because the mean of its divisors is an integer number (121003110766).

Almost surely, 2^242006221531 is an apocalyptic number.

242006221531 is a deficient number, since it is larger than the sum of its proper divisors (1).

242006221531 is an equidigital number, since it uses as much as digits as its factorization.

242006221531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 242006221531 its reverse (135122600242), we get a palindrome (377128821773).

The spelling of 242006221531 in words is "two hundred forty-two billion, six million, two hundred twenty-one thousand, five hundred thirty-one".