225750016198981 has 2 divisors, whose sum is σ = 225750016198982. Its totient is φ = 225750016198980.

The previous prime is 225750016198951. The next prime is 225750016199021. The reversal of 225750016198981 is 189891610057522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202134206846881 + 23615809352100 = 14217391^2 + 4859610^2 .

It is a cyclic number.

It is not a de Polignac number, because 225750016198981 - 2⁴³ = 216953923176773 is a prime.

It is a super-2 number, since 2×225750016198981² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225750016198951) 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 as a sum of consecutive naturals, namely, 112875008099490 + 112875008099491.

It is an arithmetic number, because the mean of its divisors is an integer number (112875008099491).

Almost surely, 2^{225750016198981} is an apocalyptic number.

It is an amenable number.

225750016198981 is a deficient number, since it is larger than the sum of its proper divisors (1).

225750016198981 is an equidigital number, since it uses as much as digits as its factorization.

225750016198981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21772800, while the sum is 64.

The spelling of 225750016198981 in words is "two hundred twenty-five trillion, seven hundred fifty billion, sixteen million, one hundred ninety-eight thousand, nine hundred eighty-one".