242551122197 has 2 divisors, whose sum is σ = 242551122198. Its totient is φ = 242551122196.

The previous prime is 242551122181. The next prime is 242551122199. The reversal of 242551122197 is 791221155242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220187116081 + 22364006116 = 469241^2 + 149546^2 .

It is a cyclic number.

It is not a de Polignac number, because 242551122197 - 2⁴ = 242551122181 is a prime.

It is a super-2 number, since 2×242551122197² (a number of 24 digits) contains 22 as substring.

Together with 242551122199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242551122199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121275561098 + 121275561099.

It is an arithmetic number, because the mean of its divisors is an integer number (121275561099).

Almost surely, 2^242551122197 is an apocalyptic number.

It is an amenable number.

242551122197 is a deficient number, since it is larger than the sum of its proper divisors (1).

242551122197 is an equidigital number, since it uses as much as digits as its factorization.

242551122197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 41.

The spelling of 242551122197 in words is "two hundred forty-two billion, five hundred fifty-one million, one hundred twenty-two thousand, one hundred ninety-seven".