225113981 has 2 divisors, whose sum is σ = 225113982. Its totient is φ = 225113980.

The previous prime is 225113963. The next prime is 225114007. The reversal of 225113981 is 189311522.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153016900 + 72097081 = 12370^2 + 8491^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225113981 is a prime.

It is a super-2 number, since 2×225113981² = 101352608883336722, which contains 22 as substring.

It is equal to p_12388802 and since 225113981 and 12388802 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112556990 + 112556991.

It is an arithmetic number, because the mean of its divisors is an integer number (112556991).

Almost surely, 2^225113981 is an apocalyptic number.

It is an amenable number.

225113981 is a deficient number, since it is larger than the sum of its proper divisors (1).

225113981 is an equidigital number, since it uses as much as digits as its factorization.

225113981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 32.

The square root of 225113981 is about 15003.7988856156. The cubic root of 225113981 is about 608.3228867329.

The spelling of 225113981 in words is "two hundred twenty-five million, one hundred thirteen thousand, nine hundred eighty-one".