225520081 has 2 divisors, whose sum is σ = 225520082. Its totient is φ = 225520080.

The previous prime is 225520073. The next prime is 225520093. The reversal of 225520081 is 180025522.

225520081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225270081 + 250000 = 15009^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 225520081 - 2³ = 225520073 is a prime.

It is a super-2 number, since 2×225520081² = 101718613868493122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (225520781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112760040 + 112760041.

It is an arithmetic number, because the mean of its divisors is an integer number (112760041).

Almost surely, 2^225520081 is an apocalyptic number.

It is an amenable number.

225520081 is a deficient number, since it is larger than the sum of its proper divisors (1).

225520081 is an equidigital number, since it uses as much as digits as its factorization.

225520081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 225520081 is about 15017.3260269597. The cubic root of 225520081 is about 608.6884667539.

The spelling of 225520081 in words is "two hundred twenty-five million, five hundred twenty thousand, eighty-one".