242195751251 has 2 divisors, whose sum is σ = 242195751252. Its totient is φ = 242195751250.

The previous prime is 242195751223. The next prime is 242195751289. The reversal of 242195751251 is 152157591242.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242195751251 is a prime.

It is not a weakly prime, because it can be changed into another prime (242195781251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121097875625 + 121097875626.

It is an arithmetic number, because the mean of its divisors is an integer number (121097875626).

Almost surely, 2^242195751251 is an apocalyptic number.

242195751251 is a deficient number, since it is larger than the sum of its proper divisors (1).

242195751251 is an equidigital number, since it uses as much as digits as its factorization.

242195751251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252000, while the sum is 44.

The spelling of 242195751251 in words is "two hundred forty-two billion, one hundred ninety-five million, seven hundred fifty-one thousand, two hundred fifty-one".